Topic
Mortar
About: Mortar is a research topic. Over the lifetime, 25024 publications have been published within this topic receiving 218739 citations.
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TL;DR: In this article, cold water extraction (CWE) was used on profile ground powder from partially carbonated Portland cement and Portland fly ash cement mortars to study changes in the pore solution composition.
90 citations
TL;DR: In this paper, a dynamic thermo-mechanical analysis test with various frequencies (0.1 Hz-2.0 Hz) and temperatures (−30 °C−30 ǫC) is undertaken on mortars with different CRT replacement ratios (0, 20, 40, 60, 80, and 100%).
90 citations
TL;DR: The changes in mechanical properties of portland cement mortars due to the addition of carbon fibres (CF) to the mix have been studied in this paper, where compression and flexural strength have been determined in relation to the amount of fibres added to mix, water/binder ratio, curing time and porosity.
90 citations
TL;DR: In this paper, the strain-rate sensitivity of the cement paste and mortar constituents of concrete is studied experimentally, in terms of the initial elastic moduli, maximum stress, and corresponding strain.
Abstract: The strain-rate sensitivity of the cement paste and mortar constituents of concrete is studied experimentally. Saturated cement paste and mortar specimens are loaded in compression to 15,000 microstrains, 27 to 29 days after casting, using strain rates ranging from 0.3 to 300,000 microstrains/sec. Water-cement ratios of 0.3, 0.4, and 0.5 are used. Strain-rate sensitivity of the material is measured in terms of the initial elastic moduli, maximum stress, and corresponding strain. The initial elastic moduli and the strength of cement paste and mortar increase by 7% and 15%, respectively, with each order of magnitude increase in strain rate. The strain at the maximum stress is the greatest for the lowest strain rate. With an increase in strain rate, the strain at the maximum stress first decreases and then increases.
90 citations
TL;DR: In this paper, the authors investigated combined treatments applied on bottom ash fines (BAF) to increase their reactivity and compared the treated BAF with both untreated BAF and cement, and its contribution to cement hydration.
Abstract: Untreated municipal solid waste incineration (MSWI) bottom ash fines (0–2 mm) have poor pozzolanic properties, and contain substances which can pose an environmental risk (e.g. heavy metals and salts). This study investigates combined treatments applied on bottom ash fines (BAF) to increase their reactivity. The treated BAF is compared with both untreated BAF and cement, and its contribution to cement hydration is investigated. Additionally, the utilization of the treated BAF in mortar as cement replacement is tested. Finally, the leaching properties of mortars containing treated and untreated BAF are estimated. According to the results obtained, the 28-day compressive and flexural strengths of mortar with 30% treated bottom ash are about 16% and 6% lower than the reference mortar, respectively. The leaching of contaminants from the crushed mortars with BAF are well under the limit values imposed by Dutch legislation.
90 citations