Introduction. As the most widely used construction materials, cementitious mixtures like concrete are exposed to a wide range of physical and chemical processes and factors such as traffic load, aging, freeze–thaw cycles, and silica alkali reaction (ASR), which can reduce the lifetime and stability of structures through concrete degradation [1].

2.1 Binders and SCMs. An Australian General Purpose (GP) cement conforming to AS 3972 [] was used in this study.Low-calcium FA conforming to AS 3582.1 [] and PGP were sourced locally, and their reactivity was assessed through a series of analytical techniques to investigate the expansion mitigation induced by ASR.The …

Effects of nano-SiO 2 and glass powder on mitigating alkali-silica reaction of cement glass mortars. Author links open overlay panel Yamei Cai ... Swelling caused by alkali-silica reaction (ASR) in concrete is a deleterious behavior due to reactions between alkaline pore solution and amorphous or metastable forms of silica in …

The high-alkali cement concrete cracked at 5 years and low-alkali cement cracked after 12 years. The high-alkali cement Wwas replaced with various amounts of SCMs. Two concretes, containing 50% ground granulated blastfurnace slag (GGBFS) and a ternary blend of 25% slag plus 3.8% silica fume interground with a high-alkali portland …

Download Citation | Expansion and Mitigation of Alkali-Silica Reaction in Binary Blended Concrete Confining Potentially Reactive Aggregates | Without a cure but preventable, Alkali-Silica Reaction ...

Alkaline-activated materials (AAMs) have been developed as an alternative binder for cement in an effort to reduce the carbon footprint. However, due to the high alkaline contents in AAMs, these materials, particularly ground granulated blast-furnace slag (GGBS)-based AAM, may have a high potential of detrimental alkali-silica …

DOI: 10.1016/j.cemconres.2020.106176 Corpus ID: 224926050; Mitigation of alkali-silica reaction by limestone calcined clay cement (LC3) @article{Nguyen2020MitigationOA, title={Mitigation of alkali-silica reaction by limestone calcined clay cement (LC3)}, author={Quang Dieu Nguyen and Taehwan Kim and Arnaud Castel}, journal={Cement …

Case studies for mitigating alkali-silica reaction (ASR) in concrete, involving cast-in-place and precast concrete construction, are included.

The use of SCMs such as coal fly ash and blast furnace slag are currently the most widely used strategy to mitigate ASR; however, SCMs present their own set of challenges. There has been a steady decline in the supply and quality of fly ash in many countries. ... Effects of nano-SiO 2 and glass powder on mitigating alkali-silica …

About 14 tonnes of granulated ferronickel slag (FNS) is produced as a by-product in the production process of 1 tonne of ferronickel.The physical properties of FNS are suitable for its use as fine aggregates in concrete. This paper presents a study on the expansion due to alkali-silica reaction (ASR) of mortar bars containing different …

The ASR, identified in 1940 [6], is the chemical reaction between the reactive constituents of the cement aggregates and the alkali (K + and Na +) and hydroxyl (OH –) ions present in the interstitial concrete pore solution [2], [7], [8]. ASR involving rocks and minerals containing reactive silica forms are currently considered as the cause of ...

DOI: 10.1016/J.CEMCONRES.2021.106440 Corpus ID: 234819428; New insights into the role of fly ash in mitigating alkali-silica reaction (ASR) in concrete @article{Hay2021NewII, title={New insights into the role of fly ash in mitigating alkali-silica reaction (ASR) in concrete}, author={Rotana Hay and Claudia P. Ostertag}, …

Resistance of alkali-activated slag concrete to alkali-aggregate reaction. Cement Concr. Res., 31 (2001), pp. 331-334, 10.1016/S0008-8846(03)00125-X. View PDF View article View in Scopus Google Scholar ... The ASR mechanism of reactive aggregates in concrete and its mitigation by fly ash: a critical review. Construct. Build. Mater., 171 (2018 ...

The research investigates the impact of limestone calcined clay cement (LC 3) on the mechanical properties and durability of cement-based materials in the context of alkali-silica reactions (ASR) for sustainable construction.Comparative experiments were conducted on binary and ternary blends of low-grade kaolinitic calcined clays and …

AbstractThe effect of combining brass-coated steel microfiber and ground-granulated blast-furnace slag (GGBS) on the mitigation of deleterious expansion due to alkali-silica reaction (ASR) was investigated in this research. A …

Limestone calcined clay cement (LC 3 ) is a type of ternary cement system in which nearly 50 % of the conventional OPC is replaced with limestone and kaolinitic calcined clays [35].

ASTM C441, Standard Test Method for Effectiveness of Mineral Admixtures or Ground Blast-Furnace Slag in Preventing Excessive Expansion of Concrete Due to Alkali-Silica Reaction â ¢ Mortar bar test, intended to assess effectiveness of SCMs in reducing ASR expansion. â ¢ Test uses high-alkali cement and Pyrex glass. â ¢ Test not very ...

The higher the slag content, the greater the ability to inhibit the reaction [54], and the minimum amount of slag required to inhibit the reaction depends on the aggregate reactivity and the ...

Mitigating alkali-Silica Reaction. Slag Cement in Concrete. No. 8. What is alkali-silica Reaction? The best way to mitigate ASR is to prevent its occurrence through the proper …

Generally, mitigation by using pozzolanic materials is commonly adopted. This study compared the effectiveness of a highly-reactive nano-SiO 2 (NS) and a slowly-reactive waste glass powder (WGP) on mitigating ASR of cement mortars prepared with crushed glass cullet as aggregates. The experimental results showed that incorporating …

A set of recommended mitigation procedures was developed that requires not only the use of low-alkali cement, but replacement of part of it by Class F fly ash (or Class N pozzolan) (25 to 40% by weight), or ground granulated blast-furnace slag (GGBFS), Grade 100 or 120 (40 to 50% by weight), or a combination of both.

Studies of blended cement + SCM pastes show that the order of pozzolanicity is as follows: silica fume > metakaolin > fly ash > slag, which is consistent with the order of efficacy of …

For a typical concrete pavement with cement content = 350 kg/m 3 and w/c = 0.45, a low-alkali cement produces a concrete alkali loading of 2.1 kg/m 3 or less. Assuming a degree of cement hydration of 70% and that the concrete is kept in saturated condition, a pore solution pH = 13.65 is estimated using the NIST pore solution …

This work included a laboratory investigation to evaluate and mitigate Alkali-Silica Reaction (ASR) in recycled concrete aggregates (RCA) with different SCM: fly …

Alkali-silica reaction (ASR) mitigation mechanisms of fly ash in concrete are still being debated and remain an interesting research topic. This study provides new insights into the role of aluminum oxide (Al 2 O 3) in fly ash particles on ASR mitigation.A comprehensive test program was conducted and included expansion measurements, …

The pH of concrete pore solution is at least 12.5, at which point the solution is in equilibrium with calcium hydroxide (Ca(OH) 2), an abundant hydration product present in …

The effect of combining brass-coated steel microfiber and ground-granulated blast-furnace slag (GGBS) on the mitigation of deleterious expansion due to alkali-silica reaction (ASR) was ...

1 Using Supplementary Cementitious Materials to 2 Mitigate Alkali-Silica Reaction in Concrete with 3 Recycled Concrete Aggregate 4 Matthew P. Adams, Ph.D.1 2and Jason H. Ideker, Ph.D. 5 Abstract ...

Pore solution in alkali-activated slag cement pastes. Relation to the composition and structure of calcium silicate hydrate. Cem. Concr. Res. (2004) ... On utilization and mechanisms of waste aluminium in mitigating alkali-silica reaction (ASR) in concrete. Journal of Cleaner Production, Volume 212, 2019, pp. 864-879.

AbstractThis study investigates the mechanisms of alkali-silica reaction (ASR) mitigation by supplementary cementitious materials (SCMs) under accelerated mortar bar test (AMBT) conditions. ... "Composition and microstructure of 20-year-old ordinary portland cement–ground granulated blast-furnace slag blends containing 0 to slag ...