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Laboratory Trabecular Test Of Anti‑Reflection Crack Of Modified Asphalt Overlaying, Zhang Zhiying, Jie Jianguang, Zhang Bingyang, Zhu Yiwei, Zhao Yong Nov 2023

Laboratory Trabecular Test Of Anti‑Reflection Crack Of Modified Asphalt Overlaying, Zhang Zhiying, Jie Jianguang, Zhang Bingyang, Zhu Yiwei, Zhao Yong

Journal of China & Foreign Highway

In view of the disadvantages of surface reflection cracks that are easy to occur after asphalt layer overlay on airport cement pavement, a laboratory beam three-point bending test was conducted to investigate the generation and development process of reflection cracks of modified asphalt and cement composite beams under different types of bottom cracks, and the ability of different modified asphalt mixtures to resist surface reflection cracks was evaluated. The results show that under the three-point bending loading mode, the development process of cross crack and transverse crack is similar, and the influence of vertical crack on the reflection crack is …

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Reliability Analysis Of Rc Simply Supported Beams Strengthened By Uhpc, Zhang Jie, Lin Pengzhen Nov 2023

Reliability Analysis Of Rc Simply Supported Beams Strengthened By Uhpc, Zhang Jie, Lin Pengzhen

Journal of China & Foreign Highway

In order to study the reliability of reinforced ultra-high performance concrete (UHPC), a calculation model of the flexural capacity of the reinforced UHPC section was proposed, and the applicability of the model was verified by the existing test results. Through the calculation example of strengthening RC simply supported beams by increasing the section of UHPC, the JC check point method was finally employed to obtain the reliability before and after reinforcement, combined with the error transfer formula and the uncertainty of various factors. An in-depth analysis of the improvement effect of UHPC reinforcement on structural reliability and the improvement of …

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Application Of Wind Speed Probability Distribution Models In Calculation Of Basic Wind Speed Of Bridge, Chen Hongxin, Ceng Jiadong∗, Zhang Zhitian Nov 2023

Application Of Wind Speed Probability Distribution Models In Calculation Of Basic Wind Speed Of Bridge, Chen Hongxin, Ceng Jiadong∗, Zhang Zhitian

Journal of China & Foreign Highway

By comparing the applicability of various wind speed probability distribution models in the calculation of the basic wind speed of bridges, the differences between different distribution models were analyzed, and the important influence of different distribution models on the value of extreme wind speed of highway bridges was studied. This paper also discussed how to select suitable wind speed probability models according to regional characteristics. Based on the measured wind speed data of five regions, the differences between the models were verified based on the statistical results of the maximum annual average wind speed, and the rationality and applicability of …

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Study On Seismic Isolation Of Concrete Filled Steel Tubular Tied Arch Bridge Considering Traveling Wave Effect, Gao Zhonghu, Wu Zhongtie, Di Shengkui, Wu Yun, Wang Xiaoqin Nov 2023

Study On Seismic Isolation Of Concrete Filled Steel Tubular Tied Arch Bridge Considering Traveling Wave Effect, Gao Zhonghu, Wu Zhongtie, Di Shengkui, Wu Yun, Wang Xiaoqin

Journal of China & Foreign Highway

By using the finite element analysis software Midas/Civil, two types of models of concreted-filled steel tube arch bridges with and without shock isolation were established. By considering the longitudinal travelling wave effect of the bridge, the different response values of the arch ribs and piers of the two models were compared under the wave velocity of 100 m/s, 500 m/s, 2 000 m/s, and longitudinal consistent seismic excitation, respectively. It is concluded that because the travelling wave effect of different wave velocities is complicated, the models both have good isolation effects for different wave velocities.

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Measurement And Analysis Of Hydration Heat Effect Between Adjacent Segments Of Cast‑In‑Place Pc Box Girder, Hong Jinsheng, Liu Luming, Pei Bingzhi, Zhu Zuhuang, Huang Ning, Fang Zhi Nov 2023

Measurement And Analysis Of Hydration Heat Effect Between Adjacent Segments Of Cast‑In‑Place Pc Box Girder, Hong Jinsheng, Liu Luming, Pei Bingzhi, Zhu Zuhuang, Huang Ning, Fang Zhi

Journal of China & Foreign Highway

In order to determine the effect of hydration heat of the post-cast section of cast-in-place prestressed concrete box girder on its own section and adjacent poured section during the construction process, the mechanical properties, temperature field of hydration heat, and strain field of early-age concrete N13 section of the southern span concrete box girder were measured on site against the background of Wuxue Yangtze River Bridge. The finite element models of the N13 section and its adjacent poured sections were established to analyze the development law of hydration heat temperature field and stress field between adjacent sections of the concrete …

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Analysis Of Influencing Factors Of Internal Force Of Four‑Column Bridge Pier And Cover Beam, Ceng Xianying, Wang Yuesong, Jiang Tianyong Nov 2023

Analysis Of Influencing Factors Of Internal Force Of Four‑Column Bridge Pier And Cover Beam, Ceng Xianying, Wang Yuesong, Jiang Tianyong

Journal of China & Foreign Highway

In order to study the factors affecting the internal force of a four‑column bridge pier and cover beam and solve the problem of inconsistent weight load of left and right sides, Midas/Civil was used to establish a finite element model of the bar system. By comparing the internal force under different weight ratios of left and right sides, temperature, and uneven settlement, the influence of weight ratios of left and right sides, temperature, and uneven settlement on the internal force of a four‑column bridge pier and cover beam was analyzed. The results show that when the weight of the left …

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Automatic Measurement Method Of Cable Wire Corro Sion Pit Shape Based On Digital Image Processing, Xu Hongsheng, Wang Lei, Yan Donghuang, Wu Jiadong Nov 2023

Automatic Measurement Method Of Cable Wire Corro Sion Pit Shape Based On Digital Image Processing, Xu Hongsheng, Wang Lei, Yan Donghuang, Wu Jiadong

Journal of China & Foreign Highway

In order to solve the shortcomings of the manual method in the measurement accuracy of the pitting pit size and the measurement efficiency of the pitting pit location of the cable wire, the digital photos of the steel wire in the laboratory accelerated corrosion test were taken as the research object. Based on the digital image processing technology and the influence of the wire surface, an automatic measurement method for the location of the pitting pit shape parameters and the relative position between multiple pitting pits on the surface of the corroded wire was proposed. The results of automatic measurement …

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Seismic Performance Analysis Of Cfrp Reinforced Socke T Pier, Li Qian, Lv Wenshu Nov 2023

Seismic Performance Analysis Of Cfrp Reinforced Socke T Pier, Li Qian, Lv Wenshu

Journal of China & Foreign Highway

Compared with traditional cast-in-place concrete piers, prefabricated socket piers have the advantages of easy construction, but they are more likely to be damaged under earthquakes. In order to optimize its seismic performance, the CFRP reinforcement method was used to strengthen socket piers. Based on the existing tests, a three-dimensional finite element model was established by using Abaqus software to analyze the seismic performance indexes such as hysteretic properties and residual deformation of the socket piers under the combined action of axial compression load and low-cycle reciprocating load. The research results show that the advantages of the CFRP cloth are not …

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Research On Load Lateral Distribution Of Steel Plate Composite Wide Bridge With Less Transverse Connection, Li Liming, Hou Kun, Li Jiquan Nov 2023

Research On Load Lateral Distribution Of Steel Plate Composite Wide Bridge With Less Transverse Connection, Li Liming, Hou Kun, Li Jiquan

Journal of China & Foreign Highway

At present, the number of lateral connection arrangements in steel plate composite wide beam bridges tends to decrease. In order to study the transverse stress distribution of the bridge, especially load and compare the applicability of the calculation methods for the transverse load distribution coefficient, a 30 m simply supported steel plate composite wide beam bridge was studied. The finite element method and several Chinese and foreign calculation methods were used to calculate the transverse load distribution coefficient, and the thickness of the bridge panel and the size of the steel brace were selected as parameters for comparative analysis. The …

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Research On Operation Visualization Of Arch Bridge Based On Bim Technology, Tong Guangxu, Xie Yan, Song Hua, Chang Jun Nov 2023

Research On Operation Visualization Of Arch Bridge Based On Bim Technology, Tong Guangxu, Xie Yan, Song Hua, Chang Jun

Journal of China & Foreign Highway

The data of the current bridge structure in the process of operation and maintenance is messy and less visual. In order to improve the monitoring efficiency, ensure the safety of daily bridge operations, and solve the problems of monitoring information visualization, dynamic real-time early warning, and insufficient information sharing of operation and maintenance management in traditional bridge monitoring and management, the characteristics of BIM software was utilized, such as high visualization and applicability in the project life cycle. The health monitoring system was established by combining communication technology and a database. The health monitoring information was visualized, and the functions …

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Temperature Control And Simulation Analysis Of Mass Cap In Winter, Tian Zhongchu, Ning Chen, Ma Lianfeng, Zhong Zhong, Xu Binlin Nov 2023

Temperature Control And Simulation Analysis Of Mass Cap In Winter, Tian Zhongchu, Ning Chen, Ma Lianfeng, Zhong Zhong, Xu Binlin

Journal of China & Foreign Highway

Due to the hydration heat reaction of concrete during the construction of the mass cap in winter, the temperature inside and outside the cap is greatly different, and the water temperature of the cooling pipe is difficult to control, which is easy to produce large stress and lead to cracks. In this paper, by means of high-frequency temperature monitoring and high-density measurement point layout, finite element software was used to simulate the humidity change process of large-scale concrete construction on the mass cap. The calculated results were consistent with the measured temperature change trend, and the maximum percentage of peak …

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Research On Transverse Temperature Gradient Of Flat Steel Box‑Girder In Mountainous Area Based On Long Term Monitoring, Yang Wenfu, Chen Xin Nov 2023

Research On Transverse Temperature Gradient Of Flat Steel Box‑Girder In Mountainous Area Based On Long Term Monitoring, Yang Wenfu, Chen Xin

Journal of China & Foreign Highway

In order to realize the accurate description and prediction of the temperature field and temperature effect of the bridge structure, the characteristics of the transverse temperature gradient of a flat steel box girder in a mountainous area were analyzed. Firstly, based on the long-term monitoring data of the temperature field of the flat steel box girder structure of a suspension bridge in a mountainous area, the transverse temperature difference extremum was analyzed, and the asymmetric distribution characteristics of the structural temperature field were obtained by using cluster analysis. Then, the probability density model of the transverse temperature difference between the …

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Research Of Digital Delivery Method For Conventional Bridge Design Information Based On Bim+Gis Technology, Dan Chen, Zhu Ming, Xiao Chunhong Nov 2023

Research Of Digital Delivery Method For Conventional Bridge Design Information Based On Bim+Gis Technology, Dan Chen, Zhu Ming, Xiao Chunhong

Journal of China & Foreign Highway

Conventional bridge design and construction methods have been relatively mature, but the design results are mainly presented in the form of paper documents, and the digital application of design information in the stage of bridge construction and later operation and maintenance is difficult. Based on the existing standard system, this paper conducted a systematic study on the conventional bridge structure entity decomposition, BIM model information, classification and coding, and rules by components and terms, respectively, established the digital delivery standards for conventional bridge design information, and used Revit software to develop the rapid modeling software for conventional bridges. Combined with …

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Analysis Of Error Propagation In Construction Control Of Main Beams Of Large‑Span Composite Beam Cable‑Stayed Bridges, Yang Rugang, Chen Bo, Han Bing Nov 2023

Analysis Of Error Propagation In Construction Control Of Main Beams Of Large‑Span Composite Beam Cable‑Stayed Bridges, Yang Rugang, Chen Bo, Han Bing

Journal of China & Foreign Highway

At present, there are few studies on the construction error sensitivity of superimposed beams, the cause of error prediction, the change of error, and error propagation pathways. To improve this situation, this paper selected the asymmetric steel-concrete superimposed beam cable-stayed bridge, namely Yibin Nanxi Yangtze River Bridge as the support project and used the finite element analysis software to simulate the whole process of the bridge considering geometric nonlinear construction. On the premise that the sensitivity parameters in the construction process cannot be completely accurate, the influencing factors and formation mechanism of the main beam installation error were analyzed, and …

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Study On Mechanical Behavior Of Epoxy Asphalt Pavements On Thicker Steel Bridge Decks Under Static Load, Ceng Guodong, Huang Hongming, Xu Wei Nov 2023

Study On Mechanical Behavior Of Epoxy Asphalt Pavements On Thicker Steel Bridge Decks Under Static Load, Ceng Guodong, Huang Hongming, Xu Wei

Journal of China & Foreign Highway

In order to improve the durability of steel bridge deck pavement, this paper evaluated the mechanical response law of epoxy asphalt pavement with thicker steel bridge deck based on the static load test of solid steel bridge deck pavement and analyzed the transverse strain distribution, critical load, overload effect, axial and transverse strain difference, and the strain condition of epoxy asphalt pavement structure. It identified the mechanical behavior law of epoxy asphalt pavement. The results show that the bridge deck structure is basically in an elastic state under axle load; the surface strain of the bridge deck increases obviously with …

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Overall Design Of Single Span Super Wide Tied Arch Bridge With Three Ribs And Five Cables, Liu Jie, Wei Lixin Nov 2023

Overall Design Of Single Span Super Wide Tied Arch Bridge With Three Ribs And Five Cables, Liu Jie, Wei Lixin

Journal of China & Foreign Highway

Shayong Bridge on Dongguan Binhai Avenue is a special-shaped steel box tie arch bridge with a single span of 120 m and five cable planes. The standard section width of the bridge is 80 m. A new type of spatial special-shaped arch bridge with an ultra-wide deck for urban roads was proposed to meet the landscape and structural stress requirements. The main beam adopted the full-width crossbar beam system, and the arch rib adopted the inverted trapezoidal steel box structure with varying height and width. The rise span ratio of the middle arch rib was 1/3.05, with the design vector …

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Analysis And Application Of Steel‑Concrete Composite Girder Bridge Design Method Based On American Specification, Yang Kai, Liu Wanyue, Zhou Xiaowu Nov 2023

Analysis And Application Of Steel‑Concrete Composite Girder Bridge Design Method Based On American Specification, Yang Kai, Liu Wanyue, Zhou Xiaowu

Journal of China & Foreign Highway

Based on the actual project of the reconstruction and expansion of the Jakarta–Chikampe Expressway in Indonesia, this paper introduced the design method, loading mode, and bearing capacity calculation of the composite beams related to the American code and analyzed the design theory based on the provisions of the code. It also summarized the division of section types, so as to provide references for bridge designers to apply and understand the American AASHTO code.

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Effect Of Bolt Force Loss On Fatigue Performance Of Welded Cable Clamp, Song Jian, Xue Songling, Li Hui, Li Hongsheng Nov 2023

Effect Of Bolt Force Loss On Fatigue Performance Of Welded Cable Clamp, Song Jian, Xue Songling, Li Hui, Li Hongsheng

Journal of China & Foreign Highway

When the cable clamp is used, the bolt force will be relaxed, which will cause the stress amplitude on the cable clamp member to change. For welded cable clamps, the fatigue properties at the weld will change. In this paper, the effect of bolt force relaxation on the weld fatigue life was studied by taking the relaxation of bolt force of welded cable clamps of Xintian Yangtze River Bridge in Wanzhou District during operation as an example. Firstly, the geometric shape and structural characteristics of welded cable clamps were analyzed, and the numerical model of welded cable clamps with bolts …

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Study On Selection Of Plane Layout Schemes Of Rock Bolts On Tunnel Face, Yang Lihong, Chen Danghui, Zheng Chao Nov 2023

Study On Selection Of Plane Layout Schemes Of Rock Bolts On Tunnel Face, Yang Lihong, Chen Danghui, Zheng Chao

Journal of China & Foreign Highway

In order to select the optimal plane layout scheme for advance anchor bolts in the tunnel face, based on Chinese and foreign engineering examples, the components of the plane layout scheme for advance anchor bolts in the tunnel face were summarized as shape and alignment. On this basis, four different plane layout schemes based on rectangular and circular shapes were summarized. Based on the Muzhailing Tunnel of Weiyuan–Wudu Expressway, the difference in supporting effect of different plane layout schemes for advance anchor bolts in the tunnel face was studied by numerical simulation under the conditions of different anchor bolt layout …

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Case Study On Substitutability Of National Standard And European Standard For I‑Beams In Initial Tunnel Support Structure, Lin Bo, Xie Wenbo, Xu Xiuliang, Liu Lei Nov 2023

Case Study On Substitutability Of National Standard And European Standard For I‑Beams In Initial Tunnel Support Structure, Lin Bo, Xie Wenbo, Xu Xiuliang, Liu Lei

Journal of China & Foreign Highway

Looking for alternative steel under different standard systems to ensure the orderly progress of engineering projects is an engineering problem that needs to be faced in the field of overseas civil engineering construction. In order to evaluate the substitutability of the European standard IPE 200 I-beam and the national standard I20a I-beam in the initial support structure of the tunnel, a mechanical model of the initial support structure of the tunnel was first established, and the model parameters were calibrated using the measured test data, so as to obtain the analytical solution of the internal forces of the initial support …

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Research On Low‑Temperature Performance Of Warm‑Mixed Rubber Powder Modified Asphalt Mortar Under Freeze‑Thaw Effect, Feng Lei, Yang Xin, Chang Junpeng Nov 2023

Research On Low‑Temperature Performance Of Warm‑Mixed Rubber Powder Modified Asphalt Mortar Under Freeze‑Thaw Effect, Feng Lei, Yang Xin, Chang Junpeng

Journal of China & Foreign Highway

In order to study the low temperature performance of hot-mixed rubber powder-modified asphalt mortar (CR‑HMA) and SDYK type of warm-mixed rubber powder-modified asphalt mortar with surfactant (CR‑WMA‑S) under freeze-thaw cycle, trabecular three-point bending test was carried out under different salt environment (mass fraction of 0 and 8%) and freeze-thaw cycle times (0, 5, 10, 15, 20, and 25) to explore the improvement effect of salt freeze-thaw cycle on the low temperature performance of warm-mixed rubber powder modified asphalt mortar. The effect of the salt freeze-thaw cycle on the cracking characteristics of warm-mixed rubber powder-modified asphalt mortar was also analyzed. The …

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Analysis Of Influencing Factors On Cracking Resistance Of Soil‑Cemen, Chen Ke, Liang Shuang, Zhao Zhenguo, Zhang Haitao Nov 2023

Analysis Of Influencing Factors On Cracking Resistance Of Soil‑Cemen, Chen Ke, Liang Shuang, Zhao Zhenguo, Zhang Haitao

Journal of China & Foreign Highway

In order to study the cracking resistance of cement soil, the mixing and molding methods of the mixture samples were compared. In this paper, vibration stirring and traditional stirring were adopted, and static pressure molding and roller molding were adopted. The dry shrinkage test and temperature shrinkage test of cement soil samples with different mixing methods and molding methods were carried out to study the influencing factors of cracking resistance. The comprehensive test results show that the dry shrinkage coefficient and temperature shrinkage coefficient of cement soil by vibration stirring are smaller than those by traditional stirring, indicating that the …

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Study On Evaluation And Affecting Factors On Anti‑Efflorescene Performance Of Asphalt Mixture In Deck Pavement Of Cement Concrete Bridge, Li Ningbo, Hao Peiwen, Wang Yujin, Hu Xiaojin Nov 2023

Study On Evaluation And Affecting Factors On Anti‑Efflorescene Performance Of Asphalt Mixture In Deck Pavement Of Cement Concrete Bridge, Li Ningbo, Hao Peiwen, Wang Yujin, Hu Xiaojin

Journal of China & Foreign Highway

This paper analyzed the causes of different efflorescence phenomena and determined that the pressure difference was the main driving force of efflorescence. A self-designed critical pressure difference test was conducted to analyze the anti-efflorescence performance of asphalt mixture under different compaction methods and gradation types, and it was proposed that “critical pressure difference”, “time to start pumping at 2 kPa”, and “pumping amount at 2 kPa for 3 min” could effectively evaluate the anti-efflorescence performance of asphalt mixture. The results show that the anti-efflorescence performance of the asphalt mixture is ranked as follows: rotary compaction forming, Marshall compaction forming, and …

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Performance Of Microalgae Oil Modified Asphalt And Mixture, Wu Jingjiang, Chu Fuke, Yin Weiyong, Zhang Yong, Shi Haixia Nov 2023

Performance Of Microalgae Oil Modified Asphalt And Mixture, Wu Jingjiang, Chu Fuke, Yin Weiyong, Zhang Yong, Shi Haixia

Journal of China & Foreign Highway

In order to alleviate the shortage of petroleum asphalt and explore the applicability of microalgae oil in the field of modified asphalt, the composition of microalgae oil, as well as the conventional properties and rheological properties of modified asphalt at high and low temperatures were studied by four-component analysis, three index tests, high temperature shear rheology tests, and low temperature bending creep tests. The performance of microalgae oil-modified asphalt mixture was studied by Marshall test, high temperature rutting, and low temperature bending test. The results show that the microalgae oil is similar to the gel asphalt structure with more hard …

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Study On Meso‑Distribution Uniformity Of Coarse Aggregate Based On Image Processing, Lin Bohuang, Shi Liwan, Liao Weijie, Xiao Xin Nov 2023

Study On Meso‑Distribution Uniformity Of Coarse Aggregate Based On Image Processing, Lin Bohuang, Shi Liwan, Liao Weijie, Xiao Xin

Journal of China & Foreign Highway

The uniformity of asphalt mixture has an important influence on its physical and mechanical properties and is an important component and research object of the asphalt mixture genome. In order to provide a reference for the fine design of asphalt mixture, this paper, based on digital image technology, analyzed the uniform characteristics of the coarse aggregate distribution of Marshall specimen under different compaction conditions for three groups of different gradation levels and then evaluated the relationship between the quantitative index of coarse aggregate distribution uniformity and the macroscopic mechanical properties of asphalt mixture. The results show that the coarse aggregate …

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Research On Durability Of C 40 Sandstone Gravel Concrete In Cold Areas, Yue Zhicai, Chen Yang, Wang Qilong, Huang Weirong, Sun Zhiyuan, Xu Wei Nov 2023

Research On Durability Of C 40 Sandstone Gravel Concrete In Cold Areas, Yue Zhicai, Chen Yang, Wang Qilong, Huang Weirong, Sun Zhiyuan, Xu Wei

Journal of China & Foreign Highway

In order to utilize local materials and save project costs, sandstone gravel from Datong County of Qinghai Province was used as coarse concrete aggregate to prepare C40 bridge structural concrete in cold areas, and the durability of sandstone gravel concrete was studied. The results show that the sandstone gravel C40 concrete and basalt gravel C40 concrete are very dense, and the impermeability grade is higher than P30, which can meet the requirements of anti-impermeability of engineering projects. The electric flux of sandstone gravel concrete is less than 1 200 C, which can meet the requirement of a 100-year design life …

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Development And Performance Evaluation Of Cement Concrete Pavement Joint Fillers, Long Liqin, Zhang Dongzhang, Wang Jinyong Nov 2023

Development And Performance Evaluation Of Cement Concrete Pavement Joint Fillers, Long Liqin, Zhang Dongzhang, Wang Jinyong

Journal of China & Foreign Highway

Poor road performance of joint filler is one of the main reasons for the damage to cement concrete pavement. In this paper, a new type of joint filler was developed. The bonding property, shear resistance, and durability of the joint filler were compared through tests, and the performance of the joint filler was verified in solid engineering. The results show that the joint filler has good performance and has no obvious damage in the actual project within five years, so it has high engineering practical value.

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Effect Of Wax‑Based Warm Mix Additives On Rutting And Fatigue Performance Of Waste Crumb Rubber Modified Asphalt, Li Jiaqing Nov 2023

Effect Of Wax‑Based Warm Mix Additives On Rutting And Fatigue Performance Of Waste Crumb Rubber Modified Asphalt, Li Jiaqing

Journal of China & Foreign Highway

In the current process, the mixing and compaction temperature required for the production of waste rubber powder-modified asphalt (CRMA) is relatively high, which is often improved by adding a warm mixing agent. In order to investigate the influence of the addition of a warm mixing agent on the rutting and fatigue properties of CRMA, two kinds of wax-based warm mixing agents (pine wax and polypropylene wax) were added into CRMA, and the rotary viscosity (RV), dynamic shear rheometer (DSR), multiple stress creep recovery (MSCR), and linear amplitude scanning (LAS) tests were carried out, so as to evaluate the influence of …

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Performance Evaluation Of Water‑Based Polymer Srx Graded Broken Stone, Zhang Ping, Zhang Hongjiang, Deng Rongsheng Nov 2023

Performance Evaluation Of Water‑Based Polymer Srx Graded Broken Stone, Zhang Ping, Zhang Hongjiang, Deng Rongsheng

Journal of China & Foreign Highway

In order to investigate whether water-based polymer solution road soilfix (SRX) graded gravel can be used in the base, this paper studied the optimal SRX dosage, mechanical properties, water stability, temperature shrinkage performance, and high temperature stability of water-based polymer SRX graded gravel through laboratory molding test. The results show that the optimal SRX dosage of water-based polymer SRX graded gravel should be 0.5%. For every 0.25% increase in SRX dosage, RCBR (California bearing ratio) and compressive strength increase by at least 6.6% and 9.8%, respectively. Water-based polymer SRX graded gravel belongs to flexible base material. The elasticity modulus and …

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Influence Of Humidity On Performance Of Asphalt Mixture, Mao Hongwei, Chen Zhonghua Nov 2023

Influence Of Humidity On Performance Of Asphalt Mixture, Mao Hongwei, Chen Zhonghua

Journal of China & Foreign Highway

In order to study the influence of humidity on the performance of asphalt mixture, vacuum drying oven and constant temperature and humidity box were used to carry out humidity curing on AC-20C asphalt mixture specimen. A uniaxial penetration test, triaxial test, low temperature bending test, and uniaxial compression dynamic modulus test were carried out to obtain the high and low temperature performance of the selected asphalt mixture and the dynamic modulus and phase angle under different temperatures and frequencies. The main curve of the dynamic modulus was drawn. Through the analysis of the test results, the following conclusions are obtained: …

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