alkali silica reaction in quarry dust

Alkali silica reaction in concrete

Alkali-silica reaction (ASR) is a major cause for concrete deterioration worldwide. However, the mechanism leading to cracking has not been identified yet. In …

Effects of Mineral Admixtures on the Alkali–Silica Reaction …

The occurrence of the alkali–silica reaction (ASR) in granite manufactured sand concrete reduces its durability and service life. However, the combination and effect of different mineral admixtures on inhibiting ASR in granite-manufactured sand concrete and the in-depth understanding of the inhibition mechanism still need to be further explored. …

ALKALI-SILICA REACTIVITY OF SOME GRANITIC ROCKS IN …

Alkali-Silica reactions occur over time between alkaline cement paste and silica contained in rock aggregates as a result of the swelling due to the reaction of certain constituents in the rock ...

Indiana 2022 IDEA — Alkali-Silica Reaction (ASR)

Alkali-Silica Reaction (ASR) Alkali-silica reactivity (ASR) occurs when the high pH of a concrete pore solution (due to the alkalis [Na2O and K2O] present in cement) results in the dissolution of certain reactive silica minerals in some aggregates. Once dissolved, this silica combines with the alkalis to form an alkali-silica reaction product ...

Alkali–silica reactions (ASR): Literature review on …

At later ages the alkali–silica gel reacts with calcium, and alkalis will be released into the pore solution and increase the alkalinity of the pore solution after 28 days up to 2 or 3 years [111]. Alkali recycling starts after a fixation phase, at least part of the alkalis eventually become available for alkali–silica reaction.

Rice husk ash as a potential supplementary cementitious material in

After conducting the micro structure analysis, it was reported that the rice husk ash particles constituted for Alkali Silica Reaction (ASR) instead of controlling it. ... (2011) High-strength rice husk ash concrete incorporating quarry dust as a partial substitute for sand. Constr Build Mater 25(7):3123–3130. Article Google Scholar

Experimental investigation of the effect of fly ash and perlite …

The cement hydration reaction is an exothermic reaction characterised by a rise in temperature within concrete during its setting phase. This is significant in the case of self-compacting concrete (SCC), which has a high cement content and low water–cement ratio. An experimental investigation was undertaken to measure the temperature …

Alkali-Silica Reaction and High Performance Concrete

Damage due to alkali-silica reaction (ASR) in concrete is a phenomenon that was first recognized in 1940 by Stanton [1,2] in North America and has since been observed in many other countries. Many studies [3,4,5] were published since Stanton's first paper, but

Alkali-silica reaction (ASR) in concrete structures: …

Alkali-silica reaction (ASR) and its associated deformation are major durability problems in concrete structures and was reported as far back as the 1940s by Stanton (2008) [1]. This deleterious reaction causes excessive expansion and cracks that can lead to severe degradation of the concrete structures. Despite the age-long …

Alkali-Silica Reaction

The alkaline solution reacts with amorphous silica to produce a viscous alkali silicate gel. As the reaction proceeds Ca 2+ ions are dissolved into the pore water. These react with the gel to form solid calcium silicate hydrate whereas the alkaline solution converts the remaining siliceous minerals into bulky alkali silicate gel.

Alkali-Silica Reaction (ASR) in Concrete Explained

The reaction process may take years, but once the reaction is underway, the forces from expansion cause cracking to appear on the surface. This blog post will focus on ASR and tests to detect the potential in aggregates and aggregate-mortar mixes. Photo Credit: ASR Identification Handbook The Effect of Alkali-Silica Reaction on Concrete

Alkali-Aggregate Reactivity

Alkali-Silica Reactivity (ASR) is a chemical reaction between alkalis in the cement fraction of concrete mortar and certain types of siliceous aggregates. Resulting in the expansion and cracking of the concrete. There are at least two types of interactions between cement components and aggregates that cause si…

Novel admixtures for mitigation of alkali-silica reaction in …

Reducing the pH of the pore solution from ~14.0 ([OH −] = 1 M) to ~13.5 ([OH −] = 0.32 M) results in ~68% less hydroxyl ion concentration.The corresponding effect on the reactive silica dissolution rate can be estimated using equation (7) in Ref. [32].In the early stages of the reaction (Q (reaction quotient) ≪ K (equilibrium constant)), …

Potential alkali silica reactivity of various rock types in an

Generally, alkali–silica reaction (ASR) is considered as an internal chemical reaction between the alkaline components in the cement and active silica–silicate based mineral constituents of some aggregates. The use of aggregates susceptible of ASR in

Materials | Free Full-Text | Alkali–Silica Reactions: Literature …

The alkali–silica reaction is a universally known destructive mechanism in concrete that can lead to the premature loss of serviceability in affected structures. Quite an enormous number of research studies have been carried out focusing on the mechanisms involved as well as the mitigation and prevention of the reaction. A few in-depth …

The Chemical Durability of Cement Pastes and Geopolymers …

In the present study the use of dolomite-based quarry-dust (QD) to generate a low-energy, environmentally-friendly structural material was explored. QD was added either as an additive to conventional Portland Cement (PC) or to geopolymeric binders, formed by the alkali activation of local class F fly ash (FA).

Potential alkali silica reactivity of various rock types in an

1. Introduction. The aggregates which are potential alkali silica reactive may cause a severe degradation of concrete structure due to external environmental factors such as high humidity and sea saline water [1].When concrete is affected by alkali silica reaction (ASR), map like cracks are developed and durability of concrete is reduced …

Properties, compatibility, environmental benefits and future …

The study conducted by Nguyen et al. [24] evaluated the resistance of LC3 mortar to alkali silica reaction (ASR) through tests on the expansions of mortar bars …

Durability of new recycled granite quarry dust-bearing …

This study explored the effect of adding 10% or 20% granite quarry dust to cement on properties such as transport (total and capillary water absorption and electrical resistivity), dimensional stability (drying shrinkage and expansion), the alkali-silica reaction, heat of hydration and colour.

Investigation on mechanical behavior of engineered …

Download Citation | Investigation on mechanical behavior of engineered cementitious composites incorporating alkali‐resistant glass fiber and quarry dust | At present, engineered cementitious ...

Alkali-silica reaction in concrete: Mechanisms, mitigation and …

The hydration of Portland cement (PC) produces an interstitial concrete pore solution composed mainly of calcium hydroxide (Ca (OH) 2 ), potassium hydroxide …

Assessing Alkali Silica Reaction in Low-Alkali Concrete …

Among the many concrete distress mechanisms, alkali-silica reaction (ASR) is one of the most harmful which affects the durability and serviceability of concrete infrastructure worldwide [7, 8]. This shortens the service life of concrete, resulting in an inefficient use of the non-renewable resources and material that previously emitted CO …

Use of waste glass as sand in mortar: Part II – Alkali–silica reaction

DOI: 10.1016/J.CEMCONCOMP.2012.08.029 Corpus ID: 137143883; Use of waste glass as sand in mortar: Part II – Alkali–silica reaction and mitigation methods @article{Du2013UseOW, title={Use of waste glass as sand in mortar: Part II – Alkali–silica reaction and mitigation methods}, author={Hongjian Du and Kiang Hwee Tan}, …

Durability of new recycled granite quarry dust-bearing …

CEN-standardised, European standard EN 196-1 [13]-compliant sand with a particle size ranging from 2.0 mm to 0.078 mm was used.. A non-reactive limestone (≈97% CaCO 3) sand with a particle size of 4.0 mm to 0.063 mm was used to analyse the alkali-silica reactivity of the granite quarry dust included as a pozzolan in the design of type …

The Effects of Bauxite Residue on the Alkali Silica Reaction …

The excess sodium raises a concern to the potential occurrence of the alkali-silica reaction (ASR), a well-documented concrete durability issue shortening the service of structures worldwide. Ribeiro et al. [ 9 ] showed that, despite the high alkali-content, 20% and 30% replacement of PC by BR decrease expansion with respect to 0 and 10% ...

Experimental Investigation on Partial Replacement of …

alkali – silica reaction in concrete. Ilangovan (2008) conducted on strength and durability properties of concrete containing quarry dust as fine aggregate revealed that the overall workability value of quarry dust concrete is less, when compared to conventional concrete. Quarry dust concrete experiences better sulphate

Investigation on mechanical behavior of engineered …

Thus, this study recommends utilization of quarry dust to replace fine silica sand in the ECC at amounts ranging from 0% to in order to establish a green, sustainable and cost-effective ECC. The flowability and mechanical demeanor of the ECC mixtures in terms of the tensile, compressive and flexural properties were evaluated.

Granitic quarry sludge waste in mortar: Effect on strength …

2.3. Alkali silica reaction (ASR) In order to measure the ASR expansion for a given mix proportion, an accelerated mortar bar test was carried out on three prism specimens of 25 × 25 × 250 mm in accordance with ASTM C 1567 [20].. After 24 h of production, mortar bar specimens were demoulded and stored in distilled water at 80 °C …

Multi-Laboratory Study of the Accelerated Mortar Bar …

study was Spratt siliceous limestone from a quarry in Ottawa, Ontario. At an age in solution of 14 days, the mean expansion was found to be 0.364% (coefficient of ... Alkali-silica reactions between silica from aggregates and alkalies from cement can cause damaging expansion and cracking of concrete. These reactions need three things

Alkali-Silica Reaction: Causes and Solutions

Alkali-silica reactivity, better known as ASR, has been with us since the early 1940s. To lessen ASR problems use low-alkali …