Study of Mechanical Properties of Concrete by Replacement of Natural Coarse Aggregate with Recycled Coarse Aggregate with Metakaolin

Singh, Om Prakash; Mahendra, K.; Pareek, Ravi Kant

doi:10.1088/1757-899x/1224/1/012017

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…The RHA contains 85 to 90% of silica in it obtained from the rice milling industry. GGBFS is having lower heat of hydration when used in concrete [16]. The optimal content of GGBFS should not exceed 20% to assess early-age cracking and the proportion of GGBFS including 0%, 20%, 35%, and 50% and early-age cracking of HPC goes on increasing up to 20% under adiabatic conditions [1].…”

Section: Introductionmentioning

confidence: 99%

Behavior of Polymer Modified High Volume Fly Ash Concrete (PMHVFAC)Produced with Hybrid Textile Fibers

2023

ecb

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This research work investigates the effect of rice husk ash (RHA) and grounds granulated blast furnace slag (GGBFS) on the mechanical properties of high-strength concrete (HSC). The HSC with different proportions of RHA and GGBFS have tested the compressive strength at 7, 14, and 28 days, split tensile strength, and flexural strength at 28 days. The ordinary Portland cement was partially replaced by a weight ratio of RHA (10%, 15%, 20%), and GGBFS (10%, 20%, 40%). Experimental work was completed to restore at 20°C and 65 percent relative humidity. A total of 90 cubes, 30 cylinders, and 30 beams were cast for different mixes for compressive strength, split tensile strength, and flexural strength of concrete. The test results reported that of RHA the compressive strength increases by 6.62 percent compared to the conventional mix at 28 days split tensile strength and flexural strength increases by 6.23 and 5.21 percent. Also, the optimum percent of GGBFS compressive strength increases by 6.81 percent, and split tensile strength and flexural strength increase by 6.89 and 5.61 percent. The RHA and GGBFS-based concrete are emerging construction materials with carbon dioxide (CO 2 ) emissions compared to conventional cementitious materials. This research studied to investigate the mechanical strength characteristics of blended with RHA and GGBFS. It was observed that the addition of 30 percent GGBFS in concrete increases the compressive strength by 23 percent compared to the control mix. The experimental results showed the inclusion of GGBFS with RHA to attain compressive strength. It was accomplished that the GGBFS and RHA mixture did tend to form stable concrete.

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Section: Introductionmentioning

confidence: 99%

Behavior of Polymer Modified High Volume Fly Ash Concrete (PMHVFAC)Produced with Hybrid Textile Fibers

2023

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Mechanical and Durability Evaluation of Metakaolin as Cement Replacement Material in Concrete

et al. 2022

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Due to the increasing prices of cement and its harmful effect on the environment, the use of cement has become highly unsustainable in concrete. There is a considerable need for promoting the use of cement replacement materials. This study investigates the effect of variable percentages of metakaolin (MK) on the mechanical and durability performance of concrete. Kaolin clay (KC) was used in the current research to prepare the MK by the calcination process; it was ground in a ball mill to its maximum achievable fineness value of 2550 m2/Kg. Four replacement levels of MK, i.e., 5%, 10%, 15%, and 20% by weight of cement, in addition to control samples, at a constant water-to-cement (w/c) ratio of 0.55 were used. For evaluating the mechanical and durability performance, 27 cubes (6 in. × 6 in. × 6 in.) and 6 cylinders (3.875 in. diameter, 2 in. height) were cast for each mix. These samples were tested for compressive strength under standard conditions and in an acidic environment, in addition to being subjected to water permeability, sorptivity, and water absorption tests. Chemical analysis revealed that MK could be used as pozzolana as per the American Society for Testing and Materials (ASTM C 618:2003). The results demonstrated an increased compressive strength of concrete owing to an increased percentage of MK in the mix with aging. In particular, the concrete having 20% MK after curing under standard conditions exhibited 33.43% higher compressive strength at 90 days as compared to similarly aged control concrete. However, with increasing MK, the workability of concrete decreased drastically. After being subjected to an acid attack (immersing concrete cubes in 2% sulfuric acid solution), the samples exhibited a significant decrease in compressive strength at 90 days in comparison to those without acid attack at the same age. The density of acid attack increased with increasing MK with a maximum corresponding to 5% MK concrete. The current findings suggest that the local MK has the potential to produce good-quality concrete in a normal environment.

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Study of Mechanical Properties of Concrete by Replacement of Natural Coarse Aggregate with Recycled Coarse Aggregate with Metakaolin

Cited by 2 publications

References 5 publications

Behavior of Polymer Modified High Volume Fly Ash Concrete (PMHVFAC)Produced with Hybrid Textile Fibers

Behavior of Polymer Modified High Volume Fly Ash Concrete (PMHVFAC)Produced with Hybrid Textile Fibers

Mechanical and Durability Evaluation of Metakaolin as Cement Replacement Material in Concrete

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