A preliminary study on the effect of fine aggregate replacement with metakaolin on strength and abrasion resistance of concrete

Rashad, Alaa M.

doi:10.1016/j.conbuildmat.2013.03.038

Cited by 73 publications

(24 citation statements)

References 59 publications

(40 reference statements)

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“…The results indicated that the foam concrete with FA as filler gave relatively higher flow values and compressive strengths. Rashad [24] used metakaolin (MK) as a fine aggregate replacement to replace sand in concrete. The test results indicated that compressive strength, splitting tensile strength and abrasion resistance of concrete mixtures increased with increasing content of fine aggregate replacement with MK.…”

Section: Introductionmentioning

confidence: 99%

Reuse of Excavated Clayey Silt in Cement–Fly Ash–Bentonite Hybrid Back-fill Grouting during Shield Tunneling

Xiao

et al. 2020

Sustainability

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Excavated soils from tunnel construction need high treatment cost and pollute the environment. To investigate the feasibility of excavated clayey silt reused in back-fill grout, the flowability, stability and strength were taken as measurement indexes of grouting performance. The clayey silt was tested to be reused as substitutes for fly ash, bentonite and sand, respectively. The experimental results indicated that the clayey silt reused as a substitute for fly ash decreased the flowability and strength of grout mixes, and the clayey silt reused as a substitute for bentonite decreased the stability of grout mixes, and neither of them was feasible. The clayey silt reused as a substitute for sand decreased the flowability, but the grouting performance could be improved by adjusting the mix proportion to meet all grouting requirements. After adding the proportion of water to improve the flowability and increasing the cement:fly ash ratio to improve the strength, a scheme of clayey silt reutilization was suggested, which was cement:fly ash:bentonite:clayey silt:water = 280:230:100:680:660. At the end of this paper, the pore structure feature tests, X-ray diffraction (XRD) tests and scanning electron microscope (SEM) tests were performed to analyze the different morphology, microstructure and mineralogy characteristics before and after the clayey silt was reused as a total substitute for sand in grout mixes.

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Section: Introductionmentioning

confidence: 99%

Reuse of Excavated Clayey Silt in Cement–Fly Ash–Bentonite Hybrid Back-fill Grouting during Shield Tunneling

Xiao

et al. 2020

Sustainability

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“…for concrete production is rapidly increasing in countries around the world in order to meet the increasing needs of infrastructural development in the recent years. Due to the overexploitation in many countries, the availability of these natural aggregates has been decreasing (Rashad, 2013;. The increasing shortage of natural aggregates has created an opportunity for using by-products as fine aggregate.…”

Section: Figure-1 Stockpile Of Discarded Tiresmentioning

confidence: 99%

Using Rubber Aggregate Derived from Discarded Tires for Producing Cement Concrete towards Resource Recovery and Environmental Protection in Vietnam

Luong

Long

Tuan

et al. 2017

International Journal of Sustainable Energy and Environmental R

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Article HistoryThis study aims to explore the possibility to use rubber particles derived from discarded tire as aggregates for replacing fine and coarse natural aggregates to produce cement concrete towards resource recovery and environmental protection in Vietnam. The experimental results showed that the workability of fresh rubberized concrete was improved when replacing natural fine aggregate (sand) with fine rubber particles (2.5-5 mm) at the replacing proportions of 30-50% by volume, and when replacing natural coarse aggregate (crushed stone) with coarse rubber particles (5-20 mm) at the replacing proportions of 10-30% by volume. With respect to the mechanical properties of hardened rubberized concrete, a larger reduction in the compressive and flexural strengths was generally found when the replacing proportions increased and when coarse aggregate rather than fine aggregate was replaced by rubber particles at all replacing proportions. However, the study results also indicated that using fine rubber particles for replacing fine natural aggregate at the low replacing proportion (up to 10%) might not cause the significant effect on the compressive and flexural strength of rubberized concrete.Contribution/Originality: This is the first ever study in Vietnam to investigate the potential for using rubber particles derived from discarded tires to replace natural aggregates in producing cement concrete towards resource recovery and environmental protection in Vietnam.

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“…in the past 15 years. (Rashad, 2013).Rapidly depleting natural reserves along with a host of problems associated with extraction 37 of natural sand from river beds, has compelled the authorities in various countries across the globe to put 38 restrictions on sand extraction. (Bravard,et al, 2013).This calls for alternative materials that can be utilized 39 as partial to full replacement of natural sand in concrete.…”

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confidence: 99%

Feasibility assessment for partial replacement of fine aggregate to attain cleaner production perspective in concrete: A review

Tiwari

Singh

Nagar

2016

Journal of Cleaner Production

126

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A preliminary study on the effect of fine aggregate replacement with metakaolin on strength and abrasion resistance of concrete

Cited by 73 publications

References 59 publications

Reuse of Excavated Clayey Silt in Cement–Fly Ash–Bentonite Hybrid Back-fill Grouting during Shield Tunneling

Reuse of Excavated Clayey Silt in Cement–Fly Ash–Bentonite Hybrid Back-fill Grouting during Shield Tunneling

Using Rubber Aggregate Derived from Discarded Tires for Producing Cement Concrete towards Resource Recovery and Environmental Protection in Vietnam

Feasibility assessment for partial replacement of fine aggregate to attain cleaner production perspective in concrete: A review

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