...Wenlong Xu; Xiuhao Li; Rentai Liu; Xiao Zhang; Zhichao Chen; Zhanchao Yin; Chunyu Zhang The properties of cement grout significantly deteriorate at high temperatures, making it unable to meet the demands for reinforcement in deep engineering projects. This study employed plastic polycarboxylic...

... setting and high early-age strength. However, exposure to elevated temperatures can affect the stability of ettringite. This study focuses on the effect of elevated temperatures on the formation and stability of ettringite in CSAB binder systems with varying calcium sulfate-to-ye’elimite ratio. Samples...

... secondary raw materials were found to lead to changes in cement hydration. The influence of these materials on the hydration processes of belite and ferrite became more noticeable at a curing temperature of 5°C, but diminished with an increase in curing temperature. The BYF cement made with red mud...

..., thermogravimetric analysis and scanning electron microscopy) were used to determine the effects of changes in gypsum content on the hydration and mechanical properties of cement mixed with an accelerator at different temperatures. The results showed that an increase in the gypsum content of the cement promoted...

... understood. The production process of an alternative RHA-SS activator was thus investigated through experimental evaluations of RHA grinding time, RHA dissolution time and thermal curing temperature and time. Mechanical performance was evaluated through compressive strength tests carried out on alkali...

...Meili Meng; Zhanglan Chen; Fuming Wang The dielectric properties of cement concrete are not only related to the dielectric properties and volume ratio of each component, but also related to frequency and temperature. In order to analyse these influencing factors, a dielectric constant test was done...

...) mortars at temperatures of 23, 200, 400, 600 and 800°C was investigated. To investigate the strength parameters of the specimens, the mechanical strength and mass loss of the specimens at ambient temperatures and after exposure to elevated temperatures were determined. Petrographic image analysis was also...

...Mohammad Kamran; Kaustav Sarkar The evolution of internal temperature and relative humidity (RH) distributions in initially saturated normal concrete and mortar cubes with water/cement (w/c) ratios of 0.4, 0.5 and 0.6 stored in an indoor residential environment were recorded for over a year...

... temperature and duration. An activation energy approach was used to evaluate the effects of aging temperature and duration on the 4-day compressive strengths of the AAGIB specimens. When the amount of sodium hydroxide in the activators was low, the activation energies for the dissolution and polycondensation...

...Hossam A. Elaqra; Mohhamed A. Abou Haloub; Rifat N. Rustom; Fahad K. Alqahtani The effects of curing temperature (23, 40 and 50°C) on the mechanical properties of cement paste and concrete containing glass powder (GP; 0, 10, 20 and 30%) as a cement replacement are investigated. In addition, a new...

... content, but the trend of growth gradually slowed. The influence of sodium chloride on the hydration of CAC was found to be highly dependent on its dosage and the curing temperature. At 5°C and 20°C, the early hydration of CAC was accelerated by a small amount of sodium chloride, leading to greater...

... at which these phases form and/or carbonate affects the reaction extent of the cement with the rock and, eventually, the cement durability. 02 08 2016 06 11 2018 07 11 2018 ICE Publishing: All rights reserved 2018 hydrothermal conditions temperature well cements...

.... For dense porous solids, a long enough drying time is required to obtain a sufficiently dried status and for predicting the equilibrium moisture content by the models. Oven drying at moderate temperature can be an efficient drying method for removing water from a dense porous solid. 1 M r...

...Xun Xu; Lan Wang The residual decomposition reaction of calcium carbonate and the process of slow rise in material temperature in rotary kilns remain a bottleneck, which limits the growth in kiln capacity and reduction in energy consumption. Some researchers have put forward the idea of increasing...