Topic
Ettringite
About: Ettringite is a research topic. Over the lifetime, 2702 publications have been published within this topic receiving 67056 citations. The topic is also known as: woodfordite.
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TL;DR: In this paper, an experimental study on the magnesium sulfate resistance of mortar and paste specimens incorporating 0, 5, 10% and 15% metakaolin (MK) was performed using visual examination, reduction in compressive strength and expansion measurements.
79 citations
TL;DR: In this paper, the authors investigated the effect of formation place and morphology of ettringite on expansion in heat-cured mortars by using secondary electron images of cracked surfaces of mortars at three ages.
Abstract: In this study, time dependent ettringite formation in heat-cured mortars has been investigated. In order to clarify the effect of formation place and morphology of ettringite on expansion, secondary electron images of cracked surfaces of mortars at three ages were analysed by SEM–EDS. Also, the X-ray microtomography analysis has been performed to observe the crack formation. The expansive role of delayed formed ettringite was related with its time dependent morphology as a function of formation place. From these observations, mechanism of ettringite reformation after heat curing has been proposed. Alumina rich species were the primary sources of ettringite formation as the starting nuclei. At later ages, if S and Al sources are readily available, the mentioned alumina rich nuclei will grow up and build ball ettringite. At long term, ball type ettringites (non-expansive) converted to massive type (expansive). These conversions can only take places if the form of available space is narrow (preformed micro-cracks). Massive ettringites exert pressure in these narrow spaces and cause expansion of mortar. If the form of the available space is spherical (entrapped air voids) ball ettringites preserve their initial form and do not cause any expansion.
79 citations
TL;DR: In this paper, the authors used a TG/DTG method to identify the decomposition products of synthetic ettringite and quantified the results using XRD techniques and quantification by the TG and DTG method, which indicated a two-stage decomposition mechanism essentially accelerated by increasing temperature.
79 citations
TL;DR: In this paper, the effect of a wide range of gypsum content and curing conditions on two important geotechnical properties: the mechanical strength and swell potential of lime-treated fine-grained soil was investigated.
79 citations
TL;DR: In this article, bagasse ash (BA), a type of agricultural waste from the sugar industry, was used as an admixture to improve the unconfined compressive strength, chemical composition and microstructural properties of soft clay.
79 citations