In the twenty-first century, most high-performance concretes, and many other ordinary concretes, are now based on blended cements that contain silica fume, slag, and/or fly ash additions. Because the chemical shrinkage accompanying the pozzolanic and hydraulic reactions of these mineral admixtures is generally much greater than that accompanying conventional portland cement hydration, these ble...

Based upon the statistical distribution of flexural fatigue life data and flexural fatigue strength of the steel fibre reinforced concrete (SFRC) containing blends of limestone powder (LP) and silica fume (SF), the influence of these inserts on the flexural fatigue performance of concretes is probed. Concrete mixes were proportioned to replace 30% cement with these mineral inserts in different ...

This paper was conducted to study the behavior of lightweight concrete, incorporating local lightweight aggregate (LWA), in terms of chloride ion permeability at different ages. The effect of lightweight fine aggregate replacement by normal weight sand (0, 25, 50 and 75% by volume) was investigated. Constant level of silica fume content (10% by weight of cement) as an addition was also consider...

High performance concrete (HPC) requires a low water-to-cementitious materials mass ratio (w/cm), often with the inclusion of supplemental cementitious materials such as silica fume in the mixture, thus necessitating the use of a superplasticizer. Because of the low w/cm and rapid reaction at early ages, proper curing from the earliest time possible is very essential in HPC. Internal curing has...

Late-Stage Functionalisation (LSF) is an innovative technique that has been successfully applied to the C−H diversification of pharmaceuticals. However, LSF pyridine ring in drug-like molecules often unselective. As a result, mixture structurally related products obtained, thus making purification tedious and time-consuming. This review shines light on recent strategies addressing selectivity i...

Semi-flexible pavement has been widely used in China's road construction due to its excellent rutting resistance. Due the large difference volume stability between matrix asphalt mixture and cement mortar, internal stress of semi-flexible material is concentrated cracking likely occur. To explore influence different Influencing factors on resistance materials. This paper orthogonal design metho...

Abstract Cellular Lightweight Concrete (CLC) is a concrete brick with density lighter than bricks. The efficiency of the use and quality CLC can be determined by analysing mechanical behaviour using finite element method. purpose this study to analyse lightweight Analysis LUSAS software. model used admixture materials silica foam, palm oil fly ash (POFA) lime (CaCO 3 ). resulted in difference b...

It is well known that supplementary cementitious materials (SCMs) have obvious effects on the properties of concrete. In order to understand relationship between and ultrahigh strength concrete (UHSC), compositions UHSC were designed by simple-centroid design method. The investigated. was found incorporation silica fume (SF) improved flowability UHSC, but it decreased time acceleration period, ...

Concrete is in great demand due to global infrastructure expansion. Cement a critical component the production of concrete because it binds ingredients together. But primary issue arises environment release toxic gases such as CO3 and sulphur into atmosphere. To overcome this, some other cementitious materials, namely admixtures, were utilized partial replacements for cement. In this study, was...