Author
Meenu Kalra
Bio: Meenu Kalra is an academic researcher from Sharda University. The author has contributed to research in topics: Portland cement & Silica fume. The author has an hindex of 2, co-authored 3 publications receiving 66 citations.
Topics: Portland cement, Silica fume, Fly ash, Chloride, Cementitious
Papers
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TL;DR: In this paper, the authors have discussed the role of different type of nanoparticles in cement and concrete and used them to enhance the understanding of concrete behavior, to engineer its properties and to lower production and ecological cost of construction materials.
64 citations
TL;DR: In this paper, the authors used TAM AIR calorimeter to study the hydration of ternary OPC-FA-SF cements and found that fly ash and silica fume together improved the heat evolution but the values were lower than that of OPC.
Abstract: Hydration of ternary OPC–FA–SF cements has been studied using number of techniques. Heat of hydration studies were made with the help of TAM AIR calorimeter, and it was found that fly ash retarded the hydration of OPC and reduced the total heat evolution. However, fly ash and silica fume together improved the heat evolution, but the values were lower than that of OPC. Differential scanning calorimetric studies of cements hydrated for 28 days were made, and it was found that Ca(OH)2 produced during the hydration of OPC reacted with fly ash and silica fume. SEM pictures of hydrated cements were recorded. The results have shown that silica fume accelerates the hydration and minimizes the deficiencies of fly ash blended cement. Mechanism of hydration has been proposed.
36 citations
TL;DR: In this paper, a concrete was made by using 20 wt% fly ash (FA) blended Portland cement (OPC) incorporating 5 wt % silica fume (SF) and 0.3 wt percent Silicone Hydrophobic Powder-50 (SHP-50).
3 citations
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TL;DR: In this paper, a simple and practical method of reducing the water/binder ratio while adding super-plasticizers to maintain workability was proposed to increase the compressive strength of UHVFA concrete.
143 citations
TL;DR: Strain-hardening cementitious composites (SHCCs) exhibiting tensile strainhardening and multiple cracking are attractive for many structural applications However, the high cement content makes them difficult to construct.
Abstract: Strain-hardening cementitious composites (SHCCs) exhibiting tensile strain-hardening and multiple cracking are attractive for many structural applications However, the high cement content
93 citations
TL;DR: The most recent and relevant achievements and the existing knowledge concerning the reaction mechanisms of ASR are reviewed, and the conditioning factors, diagnostic and prognostic methodologies, preventive measures and test methods (including their limitations) conducted at an academic level are reviewed.
91 citations
TL;DR: In this article, the growth of static yield stress (τs) and thixotropic area were used to characterize the structural build-up of cement paste, and the effects of different mineral admixtures, i.e., silica fume (SF), ground slag (GS), fly ash (FA), attapulgite (AG), nano calcium carbonate (NC), and nano silica (NS) on the structural building up of cement pastes were studied.
91 citations
TL;DR: In this article, the combined effects of micro-silica (MS) and nano-silica (NS) on the compressive behavior of concrete were investigated, and the combined usage of MS and NS offers certain synergistic effect, as evaluated by a new formula proposed in this study.
69 citations