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 paper, the effect of high temperature on cement-based materials containing fly ash and nanosilica has not been well characterized, and the porosity was determined using the BET (Brunauer, Emmett, and Teller) technique to study the specimens' behavior after exposure to high temperatures.
162 citations
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TL;DR: In this paper, a calcium phosphate cement consisting of tetracalcium phosphate (TTCP) and dicalcium phosphate anhydrous (DCPA) was reduced from 30 to 5 min by use of a cement liquid that contained a phosphate concentration of 0.25 mol/l or higher.
Abstract: The setting time of a calcium phosphate cement consisting of tetracalcium phosphate (TTCP) and dicalcium phosphate anhydrous (DCPA) was reduced from 30 to 5 min by use of a cement liquid that contained a phosphate concentration of 0.25 mol/l or higher. The diametral tensile strength and conversion of the cement ingredients to hydroxyapatite (OHAp) during the first 3 h were also significantly increased by the phosphate. However, the phosphate produced no significant effects on the properties of the 24-h cement samples. Results from additional experiments in a slurry system verified that the high phosphate concentration in the solution accelerated the formation of OHAp in the TTCP + DCPA system, and this reaction could explain the fast-setting properties of the cements.
162 citations
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TL;DR: In this paper, the feasibility of using copper slag as coarse aggregates in high-strength concrete is investigated and the effects of replacing limestone coarse aggregate by copper slags coarse aggregate on the compressive strength, splitting tensile strength, and rebound hammer values of concretes are evaluated.
161 citations
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TL;DR: In this paper, the effect of copper slag (CS) and cement by-pass dust (CBPD) addition on concrete properties was studied, and two different trial mixtures were prepared using different proportions of CS and CBPD.
161 citations
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TL;DR: In this article, the current state of knowledge on durability of concrete and mortar made up of pozzolans as a partial replacement of Portland Cement is reviewed based on published documents and several potential studies have been suggested for the future research.
161 citations