Alkali-silica reaction (ASR) is a deleterious reaction that occurs between alkalis from the cement and reactive minerals of the aggregate, forming a gel that swells …

The percentage of fine aggregate replaced by stone dust (0, 20, 50, 80, and 100 percent) is explored. This paper also studied various proportions of cement concrete and stone dust (M20, M30, M40). The experimental findings revealed that adding stone dust as a fine aggregate ratio of 20%, 50%, 80%, and improved the compressive …

Available in three sizes, the well proven original Parker 'Kubitizer' Impact breaker produces material with outputs ranging from 40-200 tonnes per hour and is ideal for working in a composite crushing arrangement with Parker primary crushing plants, screens and conveyors. Feed material is broken along natural lines of weakness (the grain ...

Aggregate crushers come in different forms, each of which is designed to efficiently solve specific tasks. The most common types of aggregate crushers are: Jaw crushers:These crushers use a fixed jaw plate and a movable jaw to reduce the size of the feed material. They are ideal for primary crushing. Impact Crushers:Impact Crushers …

Abstract. The effects of reactive aggregate size and aggregate angularity on alkali–silica reaction (ASR) were studied. An all-in natural reactive aggregate was used. The coarse aggregate particles were crushed to obtain crushed fine particles. The angularity of the aggregate was determined using ASTM C1252 and EN 933-6 methods.

This study explores the effect of high content of silica sand as a partial replacement for fine aggregate for concrete making in construction purpose. In this present research four types of silica sand from two different industrial units (coarser silica sand …

concrete where it is recommended to use 10% silica fume in case of using recycled aggregate in pervious concrete production. Xu et al. [5] found that pervious concrete using RCAs coated with TiO

Semantic Scholar extracted view of "The modification effects of a nano-silica slurry on microstructure, strength, and strain development of recycled aggregate concrete applied in an enlarged structural test" by Hongru Zhang et al. ... The microstructure of recycled aggregate prepared from the crushing of old concrete was studied. It was found ...

Crushing and impact strength. Individual aggregates' mechanical behavior influences concrete's physical characteristics as it occupies the majority …

A reduction in water-binder ratio (from 0.35 to 0.30) increased the ability of the concrete to resist chloride ion's penetration. The introduction of silica fume in concrete reduced the water ...

Aggregate degradation through crushing and abrasion may profoundly affect unbound layers performance and, accordingly, pavements service life and its functional properties. As reported by Saeed et al. ( 2001) aggregate degradation in unbound layers may contribute to rutting, fatigue and surface unevenness of the asphalt …

Crushing is the most significant dust source in stone quarries and dust concentration decreases with increasing distance away from the crusher. 16, 17, 18 Quarry workers are faced with varying concentrations of silica dust depending on the working location. A high degree of respiratory morbidity and eye problems are …

The crushing technique and the size of the recycled aggregate have an impact on the quantity of adhering mortar. Prior to using recycled aggregates in the manufacturing of concrete, it is important to understand how the attached mortar affects the density and water absorption of the recycled aggregates so as to manage the …

To analyse the effect of crushing on RA's reactivity, particles of CRA between 20 and 31,5 mm were re-crushed in a small jaw crusher and separated until the particle size specified in ASTM C1260 [19] was obtained. FRA between 0.150 and 4.75 mm resulting from crushing SC-R were directly separated to match the AMBT's particle …

Crushing value of aggregates indicates its strength. Lower crushing value is recommended for roads and pavements as it indicates a lower crushed fraction under load and would give a longer service life and a more …

Jaw crusher and impact crusher were engaged to get the required size of recycled aggregates, i.e.,0 to –10 mm. SD and SCD are the wastes resulting from nearby stone-crushers . Sky-8777 BSF-made superplasticizer, free from chlorides, was used to get the required workability by reducing water content.

Due to the high hardness and superior physical properties, waste glass has been widely studied and used as replacement of natural aggregates in cement concrete [1], [2].Also, the impermeable nature of glass could lower the water absorption and drying shrinkage of concrete [3], [4].However, the major concern of using glass aggregate …

Download scientific diagram | Aggregate crushing value of granite from publication: Effects of Bamboo Leaf Ash on Alkali-Silica Reaction in Concrete | The construction industry is generally faced ...

Alkali–silica reaction (ASR) is a sequence of complex chemical processes, resulting in the formation of alkali silica gels with high swelling ability. ASR leads to the expansion of concrete and the degradation of its microstructure. The susceptibility of aggregates to alkali reaction depends, among other factors, on the type and origin of the …

This research aims to validate and extend these findings, evaluating the impact of different aggregate sizes (12 mm, 20 mm, and 40 mm) on the strength of concrete with 10% and 25% laterite ...

These cracks are formed during bottle crushing, and can further propagate by ASR. ... However, glass aggregate is prone to alkali–silica reaction (ASR), which causes expansion and cracking of architectural mortar. ... Composition–rheology relationships in alkali–silica reaction gels and the impact on the gel's deleterious …

19.1.1.2. Agro-wastes-based pozzolans. The cement production industry is regarded as the major source of greenhouse gas discharge (Mikulčić et al., 2016).As cement is perhaps the most environmentally unfriendly concrete component, its usage is generally minimized by partial substitution with industrial wastes like fly ash, silica fume, …

This literature survey examines the impact of different nano silica mixing methods on the properties of recycled aggregate concrete. With the increasing demand for sustainable construction ...

The effect of coarse aggregate crushing on the mechanical properties of normal concrete and high-strength concrete during the uniaxial compression test is investigated.

Waste reduction and decreasing the need for natural aggregate are significant environmental factors that should be taken into consideration. Both can be achieved by incorporating recycled concrete aggregate into fresh concrete mixes. Most previous studies on concrete incorporating recycled concrete aggregates mainly …

The fragments detained from the crusher vary from 10 to 50 mm. They are then further crushed using an impact crusher to achieve a size of 10–21.5 mm. The resulting conventional is used for casting the concrete. ASTM C33 sets a 50% limit for crushing and impact values for concrete aggregates made of gravel, crushed gravel, …

Abstract. The use of limestone in the construction industry has been increasing due to benefits as aggregate. Some of these benefits include good strength, low possibility of alkali-silica ...

This effect is confirmed by studies [5, 38] showing the absorption of excess water in the matrix by the lightweight aggregate and that the aggregate acts as a reservoir of water in the individual ...

36.62 MPa at 28 and 90 days, respectively. Moreover, 2%. nanosilica and 1% steel fiber volume fraction were the most. significant parameters to improve the transport properties. [13]. Full ...

Abstract: Industrial silica sand is a by-product obtained from the industries like paint, paper, rubber etc. It has a similar property with river sand and& M sand. This study explores the effect of high content of silica sand as a partial replacement for fine aggregate for concrete making in construction purpose.