Experimental Study on the Strength and Durability for Slag Cement Mortar with Bentonite

Lee, Hsien Hua; Wang, Chung-Wei; Chung, Pei-Yin

doi:10.3390/app11031176

Cited by 6 publications

(2 citation statements)

References 21 publications

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“…This is because the pozzolanic reaction between NP and the cement hydration product of portlandite enhances the durability of concrete [15,171]. In addition to these, blinding of NP in a concrete/mortar can increase durability by reducing the occurrence of corrosion of steel bar by mitigating chloride ion penetration to a concrete matrix [157,158,172,173]. That is mainly due to the microfilling ability of most NP in the concrete matrix which can mitigate the entrance of chloride ions.…”

Section: Effects On Durabilitymentioning

confidence: 99%

Effect of Natural Pozzolana on Physical and Mechanical Properties of Concrete

Fode,

Jande,

Kivevele

2024

Advances in Civil Engineering

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Construction industries are rapidly growing, sacking high amounts of concrete which has a highly dense microstructure with excellent mechanical properties, more durable, and highly eco-friendly materials. Hence, many of the researchers are interested in solving this problem with replacing concrete by natural pozzolana (NP) which is a supplementary cementitious material mostly from volcanic sources having much active silica content that can improve the durability and mechanical properties of concrete. However, it is not well-known which common optimum replacement range can give the most desirable concrete properties. So, the present study sought to review the effects of replacing NP from volcanic sources on the durability, physical, mechanical, and microstructural properties of concrete, also, to identify the most common dose of a positive effect as a replacement in concrete. The review shows that many of NP used by different literature from different places satisfy ASTM replacement standard in concrete, especially, based on its chemical compositions. Also, the review observed that employing NP in concrete significantly improves concrete workability, lengthens setting time, and reduces bulk density, porosity, water absorption, and chloride ion migration by making denser concrete microstructure. In general, adding 5%–20% of NP in concrete significantly improves compressive strength, split tensile strength, and flexural strength. Specifically, most of the studies found 15% replacement of NP having volcanic sources can give optimum strength. Besides these, most of the studies indicated that the improvement of the strength was more visible at the concrete age of 7–28 days.

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Section: Effects On Durabilitymentioning

confidence: 99%

Effect of Natural Pozzolana on Physical and Mechanical Properties of Concrete

Fode,

Jande,

Kivevele

2024

Advances in Civil Engineering

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“…The blinding of natural pozzolana in a concrete can increase durability of concrete specimen (Aravindhraj, & Sapna, 2016;Masood, et al, 2020;Lee, et al, 2021;Andrade, et al, 2021). Figure 13, shows the abrasion resistance of concrete produced with metakaolin, tested at 28, 56 and 90 days and cured in H2SO4.…”

Section: Compressive Strength Of Metakaolin-concretementioning

confidence: 99%

Experimental Investigation of the Durability Properties of Concrete Produced With Metakaolin as Partial Replacement of Cement

Agboola,

Abdulraheem,

Abbas

et al. 2024

FJS

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The research investigates the durability properties of concrete produced with metakaolin (MTK) as partial replacement of cement. Cement was partially replaced by metakaolin at 5% to 30% at an interval of 5%. Physical properties of materials were tested. A 100 x 100 x 100mm cube was used for density, compressive strength, water absorption and abrasion resistant test, while, 100mm x 200mm cylinder was used for split tensile strength, at a mix ratio of 1:2:4 with 0.5 w/c ratio, and cured at 7, 14, 28, 56 and 90 days under different curing conditions. Result shows that the density of concrete increase as the curing ages of concrete increases. The highest compressive strength of concrete at 28days was at 0% control which achieved 28.2 N/mm2 and 27.6 N/mm2, while, 10% has the highest strength of 32.1 N/mm2 and 31.1 N/mm2 at 90 days for concrete cured in H2SO4 and MgSO4 respectively. 10% MTK concrete has reduce absorption capacity of 11.34, 11.17% and 6.57% in H2O, H2SO4 and MgSO4 respectively, as compared to that of control concrete, and has improve resistance to abrasion in aggressive environment. Chemicals significantly affect the strength of concrete. MgSO4 is more deleterious to concrete than H2SO4. In conclusion, metakaolin is a suitable pozzolana for use in the production of concrete, at lower volume of replacement will enhance the reduction of cement usage in concretes, thereby reducing the production cost and environmental pollution from exploration and production of cement. 10% MTK is the optimum percentage in concrete, therefore,...

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