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 behavior of metakaolin-based geopolymers in the presence of alkali-reactive aggregates was investigated by monitoring the dimension changes and the dynamic modulus of the specimens placed in accelerated conditions at 60°C and 95% RH for up to 250 days.
Abstract: This paper assesses the behaviour of metakaolin-based geopolymers in the presence of alkali-reactive aggregates. Geopolymer mortars were made with flash metakaolin and sodium waterglass solution in presence of six different aggregates, each having different levels of reactivity to alkali–silica reaction (ASR). The behaviour of geopolymer in presence of such reactive aggregates was investigated by monitoring the dimension changes and the dynamic modulus of the specimens placed in accelerated conditions at 60 °C and 95 % RH for up to 250 days. SEM and EDX analyses were also performed at 170 days to visualize the newly formed products. A comparison with an ordinary Portland cement (OPC) was made for all aggregates in order to evaluate how strongly geopolymers were affected by ASR, if at all. Results showed that geopolymers, although they contained high concentrations of alkalis, were more able to resist ASR than OPC was, and no characteristic swelling or any significant loss of rigidity was observed for the geopolymer specimens. An exception was nevertheless noted for the mortar made with crushed glass sand, where a significant drop in rigidity was found, with the presence of a gel layer at the surface of the glass grains but without any swelling.
69 citations
TL;DR: In this article, the use of textile-reinforced mortar (TRM) jackets as a means of improving the out-of-plane performance of masonry infill walls in reinf...
Abstract: This paper presents an experimental investigation on the use of textile-reinforced mortar (TRM) jackets as a means of improving the out-of-plane performance of masonry infill walls in reinf...
69 citations
TL;DR: In this paper, the effect of curing temperature, sodium hydroxide solution molarity, alkaline solution to binder ratio and binder type on magnesium sulfate resistance of geopolymer mortar was studied.
69 citations
TL;DR: In this article, the effect of the synthetic surfactant combining with modified lignosulfonate superplasticizer can improve the compressive strength of the cement matrix, which contributes to a better dispersion of cement particles in water, and hence the cement mortar can generate more nuclei and form finer ettringite needles during the cement hydration.
69 citations
TL;DR: Blended cement mortars with fixed workability and incorporating blast furnace slag and silica fume, were tested for compressive strength and mercury intrusion, with a view to comparing their performance with that of plain Portland cement mortar and/or slag-cement mortar.
69 citations