Prevention and control of bleeding and segregation
Having been engaged in the concrete industry for many years, bleeding and segregation phenomena are often encountered. The cyclic changes caused by the constant changes in cement and admixtures are no…
Improve the adaptability of cement and admixtures
Bleeding and segregation are mainly caused by the “over-mixing” of admixtures, which leads to poor adaptability between cement and admixtures. This situation is relatively common. Therefor…
Properly conduct concrete mix design, trial mixing, and repeated verification, and select the optimized mix ratio.
The mix ratio design should establish the glue ratio, sand rate, active admixtures, admixture dosage, etc. according to the requirements. The glue ratio is directly related to the strength and workabi…
Strengthen the control of concrete production, transportation and construction processes
When producing concrete, the mixing time for strength levels below C40 should not be less than 35 seconds, and the mixing time for strength levels C40 and above should not be less than 1 minute. If th…
Flexible waterproof and anti-crack mortar anti-crack mortar waterproof mortar anti-crack waterproof mortar
1. Product introduction: This product is a special dry mortar modified by imported polymer additives and special fibers. It is waterproof, crack-resistant and impact-resistant. It can form a strong bo…
The definition of segregation and the manifestations of concrete segregation
Concrete segregation means that the amount of pumping agent or water consumption exceeds the saturation point of the cementitious material, resulting in a reduction in the resistance between cementiti…
Raw material quality cause analysis and preventive measures
Cause analysis and preventive measures for unstable mud content in sand 1.1 Cause analysis As natural sand resources become less and less, the mud content of sand also fluctuates. This phenomenon some…
Cause analysis and preventive measures on the workability of super high-rise concrete
1 Reason Analysis The working performance of concrete is stable. The concrete construction period of super high-rise buildings is longer than that of ordinary projects. Concrete needs Keep cycle perfo…
Grouting material materials and usage methods
The grouting material is made of high-strength materials as aggregates, Portland cement or ordinary Portland cement as the binding agent, and imported additives and other substances. It is very conven…
Technical and economic effects of high-performance concrete water-reducing agents
① When the water consumption remains unchanged, the slump of concrete can increase by 10 to 20cm; ② Keeping the workability of concrete unchanged, water can be reduced by 10% to 50%, and the strength …
