Topic
Cement
About: Cement is a research topic. Over the lifetime, 68440 publications have been published within this topic receiving 829356 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the influence of finely ground limestone and crushed limestone dust on the properties of self-compact concrete (SCC) mixes in the fresh and hardened state was examined. And the results indicated that finer and better-graded limestone dust significantly increased the deformability of the paste.
194 citations
TL;DR: In this paper, hydrated lime is evaluated as a filler in bitumen and is compared to similarly sized filler comprised of calcium carbonate, limestone, and limestone-concrete.
Abstract: Hydrated lime is evaluated as a filler in bitumen and is compared to similarly sized filler comprised of calcium carbonate, limestone. Extensive laboratory testing is considered, including rheological testing of mastics (with a dynamic shear rheometer, a dynamic mechanical analyzer, and a bending beam rheometer); low temperature elongation and fracture tests on mastics; torsional fatigue testing of mastics; fatigue testing of mixtures; and permanent deformation testing of mixtures. These tests confirm that hydrated lime as a filler significantly impacts the rate and level of microcrack-induced damage, microdamage healing, and plastic and viscoelastic flow in both mastics and mixtures across a wide range of temperatures (from low to high temperatures, representative of the pavement environment). Hypotheses are presented based on rheological models of filled liquids and bitumen microstructure to explain the test results and the fact that the response of hydrated lime as a filler in bitumen requires an understanding of the physical and chemical interactions on both the micro- and nanoscale. Furthermore, the impact of hydrated lime as a filler is dependent on its interaction with a specific bitumen.
194 citations
TL;DR: In this article, an experimental program was carried out in order to investigate the possibility of producing concrete incorporating large volumes of industrial by-products and secondary materials, such as fly ash as binder for cement replacement, recycled fine aggregate originating from mixed construction and demolition waste and steel slag as coarse aggregate.
194 citations
TL;DR: In this paper, the differential impedance analysis (DIA) has been applied to the study of the dielectric properties of hardened Portland cement paste, and two time constants are found in the impedance spectra obtained in the frequency region form 100 kHz to 15 MHz.
194 citations
TL;DR: In this article, the influence of glass content, color and particle size on ASR expansion of mortar was determined by the accelerated mortar bar method, and two approaches were investigated for green, brown and clear glass sand mortar, and they were: (1) replacing cement with pozzolans, that is, 30% fly ash, 60% GGBS, 10% silica fume, or 20% glass powder; (2) adding a suppressor, that are, plain steel fibers, and lithium chloride and lithium carbonate compounds.
Abstract: Waste glass may be used in concrete provided that the potential deleterious expansion caused by alkali–silica reaction (ASR) could be mitigated. In this study, the influence of glass content, color and particle size on ASR expansion of mortar was determined by the accelerated mortar bar method. Two approaches to control ASR expansion were investigated for green, brown and clear glass sand mortar. They were: (1) by replacing cement with pozzolans, that is, 30% fly ash, 60% GGBS, 10% silica fume, or 20% glass powder; (2) by adding a suppressor, that is, plain steel fibers, and lithium chloride and lithium carbonate compounds. Test results showed that the ASR expansion increased with higher glass content in the case of clear glass sand mortar, but would decrease with increasing content for green and brown glass sand mortar. The ASR expansion also decreased with smaller glass particle size, regardless of glass color. Fly ash and GGBS were the most effective in mitigating ASR expansion, followed by silica fume, steel fibers and lithium compounds.
194 citations