Topic
Cement
About: Cement is a research topic. Over the lifetime, 68440 publications have been published within this topic receiving 829356 citations.
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TL;DR: In this article, the authors investigated the possibility of using a mixture of CCR and fly ash to improve the strength of problematic silty clay in northeast Thailand and found that CCR reduces specific gravity and soil plasticity, while FA is a pozzolanic material.
Abstract: Calcium carbide residue (CCR) and fly ash (FA) are both waste products from acetylene gas factories and power plants, respectively. The mixture of CCR and FA produces a cementitious material because CCR contains a lot of Ca(OH)2, while FA is a pozzolanic material. This paper investigates the possibility of using this cementitious material (a mixture of CCR and FA) to improve the strength of problematic silty clay in northeast Thailand. The influential factors involved in this study are water content, binder content, CCR∶FA ratio, and curing time. The mechanism controlling the development of strength is also illustrated. Strength development is investigated using the unconfined compression test. A microstructural study using a scanning electron microscope and thermal gravity analysis is performed to understand the microstructural changes that accompany the influential factors. Both strength and microstructural investigations reveal that the input of CCR reduces specific gravity and soil plasticity; thus, t...
222 citations
TL;DR: Lightweight aggregates have been manufactured by sintering fly ash and crushing the product into suitable sizes as discussed by the authors, which make them suitable for high strength and high performance concrete, and they are shown to be around 22% lighter and at the same time 20% stronger than normal weight aggregate concrete.
222 citations
TL;DR: In this article, a first-order kinetic model was used to obtain values for overall sorption rate constants and intraparticle diffusion constants, and the Frumkin isotherm was found to be the appropriate equation for modelling isotherms from the experimental adsorption data.
222 citations
TL;DR: In this article, the effect of elevated temperature on the mechanical and physical properties of concrete specimens obtained by substituting cement with finely ground pumice (FGP) at proportions of 5, 10, 15, and 20% by weight was investigated.
222 citations
TL;DR: In this paper, the effect of nano-TiO 2 on the mechanical properties of cement mortar was studied and the main reason for the improvement of strength is the decrease and modification of orientation index for the nucleus function, not the increasing amount of hydration products.
222 citations