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Frost resistant concrete refers to the structural design that requires concrete to have the durability to resist freeze-thaw cycles for a long period of time, i.e., to meet the frost resistance level specified in the structural design. When frost-resistant concrete is placed in a winter environment, technical measures for winter construction must also be taken. … Read more
The technical requirements of frost-proof concrete are: during winter construction, reliable technical measures are taken to make the concrete set and harden as early as possible after casting and no frost damage shall occur before reaching the critical strength by freezing. When the temperature is 0 ~ 4 ℃, the activity of water is low, … Read more
The autogenous shrinkage of concrete is the chemical processes of Portland cement hydration lead to a type of shrinkage, which is observed in sealed specimens, i.e., at no moisture loss. Factors affecting the autogenous shrinkage of concrete are mainly cement, mineral admixtures, water-cement ratio, and aggregates. The nature of cement affecting the autogenous shrinkage of … Read more
The prefabricated concrete building was of interest in the early 20th century and was finally realized in the 1960s. Countries such as England, France, and the Soviet Union made the first attempts. Because of the speed of construction and the low production cost of prefabricated concrete buildings, they quickly spread worldwide. The early prefabricated concrete … Read more
The naming of concrete batching plant model is based on the size of the discharge. For example, HZS120 is 120 cubic meters per hour. The typical specifications of the batching plant are HZS60, HZS90, HZS120, HZS180, HZS240, HZS270, HZS300, HZS300, etc. Group code Group code HZ stands for concrete batching plant. HL stands for concrete … Read more
Why do you need to know the way to identify sea sand vs river sand? With the increasing efforts of environmental protection policies to strengthen the ecological balance. This has led to the closure of a large number of mines and the banning of sand from lakes and inland rivers, resulting in a shortage as … Read more
With the rapid development of society, the design and selection of concrete batch plant dust collectors are very important. It can improve the dust removal efficiency of the plant and make the application of concrete batch plants more effective. In this article, we analyze the application of dust removal design and equipment selection in a … Read more
What is the most dreaded problem encountered during the concrete pouring process? Of course, it is the concrete mixing plant failure that leads to downtime. The mixer truck, pump truck, and construction site can only stop work at this time and wait for the mixing plant to resume production. Therefore, to ensure a normal supply … Read more
The fineness modulus of fine sand is less than 2.3. Its sieve margin is small at 4.75mm, 2.36mm, and 1.18mm. Particle size less than 0.315mm is more. The small particle size, small fineness modulus, and large surface area of fine sand cause the water consumption of concrete to increase. If you do not take measures … Read more
Cement additive adaptability problems are manifested in the following three ways. First, the new concrete slump is small, and the expansion is smaller. But at this time, the amount of water-reducing agents has been quite large. Second, the slump loss is large, and sometimes even a false set. That is, the cement slurry is very … Read more