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, the performance of manufactured fine aggregates produced by cone crushing or impact crushing has been compared to that of mortars prepared from a natural sand control-sample, and it was shown that the unclassified impact crusher product presented the highest packing density, and mortars produced from it had comparatively low porosity and low absorptivity and the highest unconfined compressive strength.
158 citations
TL;DR: In this article, the authors discuss the mechanism of plastic shrinkage in portland cement and portland cements-silica fume paste and mortar, and the effects of the three delivery forms of silica fumes; as well as densified powder, densified powders, and slurry, on plastic shrinkages are presented.
157 citations
TL;DR: It is concluded that incorporating CRT glass in cement mortar successfully prevented the leaching of lead and it is feasible to utilize CRTGlass in cement Mortar production.
156 citations
TL;DR: In this paper, an experimental method is proposed to determine the residual mortar content (RMC) of concrete aggregates, which comprises a combination of mechanical and chemical stresses that disintegrate residual mortar and destroy the bond between the mortar and the natural aggregates.
Abstract: Recycling concrete from demolition of existing structures and using it as recycled concrete aggregates (RCAs) in structural-grade concrete have significant economic and environmental benefits. Currently, only a small portion of the concrete waste is reused in building construction, while most of it is used as either pavement base course or sent to landfills for disposal. The lack of confidence in the material properties of the concrete produced with RCAs is generally the main reason for its under-utilization in structural concrete. It has been demonstrated in the literature that the amount of residual mortar attached to the original (or “virgin”) aggregate particles is one of the factors affecting the material properties of RCAs. Therefore, before using RCAs in new concrete, it is crucial that the residual mortar content (RMC) is determined accurately; however, currently there is no standard procedure to determine this quantity. In this paper, an experimental method is proposed to determine the RMC of RCAs. The method comprises a combination of mechanical and chemical stresses that disintegrate the residual mortar and destroy the bond between the mortar and the natural aggregates. The mechanical stresses are created through subjecting RCA to freeze-and-thaw action, while the chemical degradation is achieved through exposure of the RCA to a sodium sulphate solution. The results of the proposed test procedure are validated by means of comprehensive image analysis. With the proposed approach, the attached residual mortar can be adequately removed, and the residual mortar content can be determined.
156 citations
TL;DR: In this article, the authors present results from experimental studies on mechanical properties and thermal behavior of geopolymer mortar, prepared by alkaline solution activating metakaolin and fly ash blend.
156 citations