Open Access. Powered by Scholars. Published by Universities.®

Other Civil and Environmental Engineering Commons™

Open Access. Powered by Scholars. Published by Universities.®

Journal of China & Foreign Highway

Articles 571 - 576 of 576

Full-Text Articles in Other Civil and Environmental Engineering

Study On Dynamic Allocation Optimization Of Highway Pavement Maintenance Funds, Zou Yi Mar 2023

Study On Dynamic Allocation Optimization Of Highway Pavement Maintenance Funds, Zou Yi

Journal of China & Foreign Highway

The conflict between the lack of maintenance funds and the growth of maintenance demand restricts the improvement of highway pavement technologies. In this paper, the state space of pavement maintenance demand was defined by the technical condition of the pavement, and the state of demand under different maintenance measures was designed as a Markov decision process. The dynamic allocation optimization model of highway pavement maintenance funds was established, and the corresponding genetic algorithm was designed. Finally, an example was given to simulate the optimized model. The results show that the Markov decision process can dynamically allocate highway pavement maintenance funds, …

Go to article

Influence Factors Of Deicing And Thaw Performance Of Asphalt Mixture With Low Freezing Point, Zhou Shuiwen, Lin Fang, Zhang Xiaohua, Zhang Lingbo, Jiang Haoqiu Mar 2023

Influence Factors Of Deicing And Thaw Performance Of Asphalt Mixture With Low Freezing Point, Zhou Shuiwen, Lin Fang, Zhang Xiaohua, Zhang Lingbo, Jiang Haoqiu

Journal of China & Foreign Highway

The conductivity test was used to study the release law of thawing and deicing components. The freezing test was used to study the cooling law of the mixture, and the thawing rate test was used to study the thawing and deicing performance. The results show that the release of thawing and deicing components of materials with a low freezing point is temperature-dependent, and the release at the high temperature is 3.49–3.77 times that at the low temperature. The granular materials tend to dissolve in water, which results in the release rate of thawing and deicing components faster than that of …

Go to article

Experimental Analysis On Recycling And Mechanical Properties Of Waste Cement, Chen Liang Mar 2023

Experimental Analysis On Recycling And Mechanical Properties Of Waste Cement, Chen Liang

Journal of China & Foreign Highway

In order to recycle waste cement, construction waste cement materials were collected in the laboratory, and they were crushed, ground, and heat treated to facilitate reuse. Then, the waste cement was combined with the commonly used active fly ash admixture to prepare a new cement material for test analysis. The results show that the new cement material produced by industrial by-product, fly ash and waste cement material is feasible. A small amount of construction waste cement material (about 5%) can increase the 28-day compressive strength of cement by more than 50%, and the compressive strength of the prepared building material …

Go to article

Experimental Study On Characteristics And Stability Of Different Aged Steel Slag Aggregate, Zhang Hongri, Wang Guiyao, Feng Jian, Lan Tianzhu, Wu Tao Mar 2023

Experimental Study On Characteristics And Stability Of Different Aged Steel Slag Aggregate, Zhang Hongri, Wang Guiyao, Feng Jian, Lan Tianzhu, Wu Tao

Journal of China & Foreign Highway

Steel slag aggregate has good building material properties, but the utilization rate of steel slag in road engineering is low at present. In this paper, the chemical composition, basic physical and mechanical indexes, f⁃CaO, f⁃MgO, pulverization rate, CRB expansion rate, and other indexes of open-air aged steel slag aggregate in Fangchenggang, Guangxi Province for 0, 6, and 12 months were studied. The results show that the physical and mechanical properties of steel slag aggregate basically meet the requirements of road base materials and subgrade fillers, but the indexes of f⁃CaO, pulverization rate, and CRB expansion rate of steel slag aggregate …

Go to article

Study On Effect Of Fiber Stabilizers On Water Temperature Cycle Damage Resistance Of Drainage Asphalt Mixtures, Liu Fuming, Wu Di, He Qingde, Yang Zhiping Mar 2023

Study On Effect Of Fiber Stabilizers On Water Temperature Cycle Damage Resistance Of Drainage Asphalt Mixtures, Liu Fuming, Wu Di, He Qingde, Yang Zhiping

Journal of China & Foreign Highway

In order to study the effect of fiber stabilizer on the water temperature cycle damage resistance of drainage asphalt mixture, drainage asphalt mixture without fiber stabilizer and with wood fiber, polyester fiber, and basalt fiber, respectively, were compared through tests. By standard dispersion test and immersed dispersion test, the anti-spalling ability of the mixture was analyzed. Under the same asphalt condition, the standard dispersion loss of the drainage asphalt mixture was reduced to different degrees after adding fiber stabilizer, which could increase the anti-spalling property of the drainage asphalt mixture to some extent. The splitting, indirect tensile, and rutting tests …

Go to article

Study On Road Performance Of High Content Phosphogypsum Cement Stabilized Red Clay, Yang Dezhong, Chen Kaisheng, Li Qiang Aug 2022

Study On Road Performance Of High Content Phosphogypsum Cement Stabilized Red Clay, Yang Dezhong, Chen Kaisheng, Li Qiang

Journal of China & Foreign Highway

In response to the waste of phosphogypsum resources and engineering characteristics of red clay, by referring to the mix ratio design method of fly ash mixtures, 18 sets of mix ratio samples were set up indoors. By conducting compaction tests, seven-day unconfined compression strength tests, water-stability tests, and CBR tests, exploratory research was conducted on the road performance of high content phosphogypsum stabilized red clay. The results indicate that the optimal water content of high content phosphogypsum stabilized red clay is lower than that of plain red clay. The seven-day unconfined compression strength is 1.8-3.7 times that of plain red …

Go to article

First Prev