Tests were carried out to examine these effects on the fresh, engineering, permeation and durability properties of concrete. The results show that at fixed w/c ratio, reduction in cement content by up to 22% had no adverse effect on most concrete properties and, if anything, gave some ...
Supplementary cementitious materials(SCMs) are commonly used in concrete mixtures as a replacement of a portion of clinker in cement or as a replacement of a portion of cement in concrete.This practice is favorable to the industry,generally resulting in concrete with lower cost,lower environmental ...
When does your driver's license test? [translate] afor below item,tooling已经转移到HKSH for below item, tooling already shifted HKSH [translate] aTo study the role of red oxide addition in cement at the time of casting the concrete. 在熔铸混凝土之时学习氧化铁加法的角色在水泥。 [translate] ...
EXPERIMENTAL INVESTIGATION ON STUDYING THE FLEXURAL BEHAVIOUR OF GEOPOLYMER CONCRETE SLABS UNDER FIXED BOUNDARY CONDITION Geo polymer concrete is one of the emerging construction material as a substitute for conventional cement concrete, eliminating the usage of OPC. This work is aimed to cast and testin...
The study suggests that recycled concrete fines can be incorporated into cementitious composites in large amounts and even improve their properties, especially when blended with fly ash or blast furnace slag. Substitution of Portland cement in the studied pastes by recycled concrete led to a ...
The role of calcium and magnesium in the concrete tubes of the sandcastle worm. Sandcastle worms Phragmatopoma californica build mound-like reefs by sticking together large numbers of sand grains with cement secreted from the building ... C Sun,Fantner,E Georg,... - 《Journal of ...
For example, it has been observed that overdesign is one of the main causes of unnecessary consumption of natural resources as this leads to over use of materials. The quality and grade of cement being used in the concrete today also has an important role in the consumption of these ...
Or you could pave with cement-based concrete, which is stiffer than asphalt (沥 青). This system could also be a way to shave carbon emissions without some of the usual hurdles. Usually, when it comes to reducing emissions in the transportation sector, you’re talking about changing...
Long-term alkali-silica mitigation of high-alkali concrete with cement replacements In this study, the impact of high-alkali Portland cements on the prescribed level of supplementary cementitious materials (SCMs) required in the Canadian s... D Hooton,B Fournier - 《Proceedings of the Institution...
ConcreteIn this study, the effect of CO2 concentration and ambient relative humidity (RH) on accelerated and natural carbonation of 18 concrete mixtures produced with nine different cement types is investigated. Increasing the CO2 concentration from 0.045 to 1 and 4 % at 57 % RH does not alter...