Engineering Commons^™

Assessment Of The Mechanical And Durability Characteristics Of Bio-Mineralized Bacillus Subtilis Self-Healing Concrete Blended With Hydrated Lime And Brick Powder, Mohd Abu Bakr, Birendra Kumar Singh, Ahmed Farouk Deifalla, Shatrudhan Pandey, Ahmed Hussain, Sahir Sultan Alvi, S.M. Mozammil Hasnain

Civil Engineering Faculty Publications and Presentations

Highlights

• The present paper studied the effect of biomineralization on the properties of HBr concrete.

• Strength and durability properties are improved by calcite precipitation produced by bacteria.

• CaCO3 Precipitation was confirmed in the microstructure analysis through FESEM and EDS.

Abstract

Cement is the main constituent of the concrete structure. Using rejected brick as pozzolana in replacement of cement reduced the utilization of natural resources, conserved the environment, and controlled waste disposal. Hydrated lime has been utilized as a chemical additive to improve the pozzolanic reaction of finely ground waste brick particles. This research investigates the process of biomineralization to enhance …

Synergistic Effect Of Hedp.4na And Different Induced Pouring Angles On Mechanical Properties Of Fiber-Reinforced Alkali-Activated Slag Composites, Jingjie Wei, Jianwei Liu, Kamal Khayat, Wu Jian Long

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The Poor Flexural and Damping Properties of Building Materials Damages Concrete Structures and Affects their Service Life When Concrete Structures Are Subjected to Dynamic Loads. Three Different Dosages (I.e., 0%, 0.3%, and 0.6%) of Organic Phosphonates (HEDP.4Na) and Different Pouring Methods (I.e., Conventional Pouring Method, 90°-Induced Pouring Method, and 150°-Induced Pouring Method) Were Designed to Improve the Flexural and Damping Performance of Fiber-Reinforced Alkali-Activated Slag Composites (FR-AASC). the Enhanced Mechanism of HEDP.4Na Was Revealed by Phase Analysis (X-Ray Diffraction, XRD), Pore Structure Analysis (Mercury Intrusion Porosimetry, MIP), the Heat of Hydration, and Scanning Electron Microscopy (SEM) Analysis. the Results Showed …

Compressive And Tensile Properties Of Three Fiber-Lime-Soils Under Freeze-Thaw Cycle, Li Wei, Shou-Xi Chai, Lin Zhang, Yao Li

Rock and Soil Mechanics

Generally, synthetic fiber, mineral fiber and plant fiber are added into soil to enhance the strength and deformation resistance of soil. The unconfined compressive test and splitting tensile test of three fiber-lime-soils under freeze-thaw cycle were carried out to study the variation of compressive and tensile properties of soil with freeze-thaw times. The test results showed that the optimum fiber rates of polypropylene fiber-lime-soil, basalt fiber-lime-soil and palm fiber-lime-soil were 0.2%, 0.2%, and 0.4% respectively, whether under freeze-thaw cycle or not. With the increase of freeze-thaw times, the compressive strength and tensile strength of the three fiber-lime-soils demonstrated phased downward …

Behaviour And Material Properties Of Versaloc Semi-Interlocking Mortarless Masonry, Sonam Dorji, Hossein Derakhshan, David P. Thambiratnam, Tatheer Zahra, Alireza Mohyeddin

Research outputs 2022 to 2026

Masonry construction is popular around the world, but the use of mortared masonry presents numerous challenges. In recent decades, masonry construction systems incorporating interlocking masonry units have been proposed to eliminate mortar. The interlocking between masonry units can be achieved using specially shaped units. This paper presents a comprehensive experimental study to determine the behaviour as well as basic material properties of one such semi-interlocking mortarless masonry. The experiments included testings of ungrouted masonry units, prisms, and wallets. In addition, masonry prisms and wallets with grouted cores were also investigated to study the effect of grouting. A detailed description of …