Topic
Silica fume
About: Silica fume is a research topic. Over the lifetime, 10177 publications have been published within this topic receiving 173857 citations.
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TL;DR: In this paper, the effects of graphene oxide (GO), silica fume (SF) and graphene oxide encapsulated Silica Fume (GOSF) on the rheological properties of cement pastes were investigated.
208 citations
TL;DR: In this article, two surface treatment methods (NaOH, and Silane Coupling Agent) and three coating techniques (coated with normal cement, blended cement with silica fume, and blended cement plus sodium silicate) were used to improve rubber-cement bonding.
206 citations
TL;DR: In this paper, it is suggested that high performance concrete is not fundamentally different from the concrete used in the past, although it usually contains fly ash, ground granulated blastfurnace slag and silica fume, as well as superplasticizer.
Abstract: It is suggested that high performance concrete is not fundamentally different from the concrete used in the past, although it usually contains fly ash, ground granulated blastfurnace slag and silica fume, as well as superplasticizer. The cost aspects of the use of silica fume are considered. The content of cementitious material is high and the water/cement ratio is low; the maximum size of aggregate is small. Although ordinary Portland cement is used, it must be compatible with a given superplasticizer; the causes of incompatibility are discussed. The distinct shrinkage behaviour of high performance concrete is considered and the reasons for an absolute necessity of wet curing are given. Some uses of high performance concrete are mentioned. A ‘prediction’ of the future of high performance concrete and of concrete in general is offered.
205 citations
TL;DR: In this paper, a study was carried out comparing silica fume (SF) and dealuminated kaolin (DK) as pozzolanic materials in blended cements.
205 citations
TL;DR: In this article, mechanical properties of high-strength concrete exposed to elevated temperatures were measured by heating 100 x 200 mm cylinders at 5 deg C/min to temperatures of up to 600 deg C. Heating was conducted with/without sustained stress, and properties were measured at elevated temperatures and after cooled to room temperature (RT).
Abstract: In this research, mechanical properties of high-strength concrete exposed to elevated temperatures were measured by heating 100 x 200 mm cylinders at 5 deg C/min to temperatures of up to 600 deg C. Heating was conducted with/without sustained stress, and properties were measured at elevated temperatures and after cooled to room temperature (RT). 4 mixes with water-cementitious materials (w/cm) ratios ranging from 0.22-0.57 and RT strengths ranging from 51-98 MPa were used. 2 of the mixtures contained silica fume. Measured compressive strengths and elastic moduli were normalized with respect to RT values, and analysis of variance was used to determine whether the test condition, the value of w/cm, or the presence of silica fume affected results. The influence of these variables on the tendency for explosive spalling was also examined. Results show that losses in relative strength due to high-temperature exposure were affected by the test condition and w/cm, but there were significant interactions among the main factors that resulted in complex behaviors. The presence of silica fume does not appear to have a significant effect. Measurements of temperature histories in the cylinders revealed complex behaviors believed to be linked to heat-induced transformations and transport of free/chemically combined water.
205 citations