Effect of Rice Husk Ash and Silica Fume as Strength-Enhancing Materials on Properties of Modern Concrete—A Comprehensive Review

Improvement in Fresh, Mechanical and Microstructural Properties of Fly Ash- Blast Furnace Slag Based Geopolymer Concrete By Addition of Nano and Micro Silica

“…2. The workability slightly improved when the NS and SF were added to the mix; this is due to the ball-bearing effect owing to the spherical particle shape of these materials [13,14]. However, the slump values are found to be better in comparison to the control FA-GGBFS GPC mix.…”

“…The workability behavior of the mixtures GPCNS1.5 and GPCNS2.0 are found to be following a similar trend as GPCSF1.5 and GPCSF2.0. Apart from the initial improvements offered by NS [13], the inclusion of NS also led to reduction in the workability [33,34] when the quantity of NS is added beyond 1.5%. Likewise, the addition of SF more than the optimum quantity led to a reduction in the slump values [35,36].…”

“…polymerization and hydration from fly ash and GGBFS respectively [12]. However, early age strength gain along with workability are the major issues for the wider applications of FA-GGBFS based geopolymer concrete: for which there is a demand for performance-enhancing additives such as silica fume and nano-silica [13].…”

Effect of Sodium Oxide on Physical and Mechanical properties of Fly-Ash based geopolymer composites

“…These are a class of mineral binders synthesized by activation of the source materials that could be natural or by-products of the industries, which has a high content of alumina and silica with an alkali metal hydroxide/ silicate solution at moderate temperatures (3) . These binders have been reported to possess better properties than ordinary Portland cement (OPC) based binders (4) .…”

Mikro Silika Dolgulu Yüksek Dayanımlı Betonun Mekanik Özelliklerine Ön Isıtmanın Etkisi

“…These wastes prevent environmental pollution and contribute positively to the economy and durability of concrete. [12][13][14][15][16][17].Adding silica fume to cement concrete increases the compressive strength and other mechanical properties of the concrete. These improvements are due to the closed packing achieved in the cement paste system, which reduces the total porosity and improves the interfacial transition zone [18].…”