Summer is the best season for construction, and many construction project sites are taking advantage of this golden construction period to work overtime to catch up with the schedule, increasing the pressure of construction concrete production.All the staff of Tongya Company braved the heat, deployment, overtime work, quality and quantity to meet the concrete supply of each construction site.

Scientific adjustment of the formula to ensure the quality of concrete.Due to high temperatures, dry climate, strong ultraviolet ray, big wind, sunlight is strong, the slump loss of concrete mixture relatively fast, easy to cause the concrete slump is good, but from the mixing station transport to the construction site in slump is bad, that is to say from the machine to the construction site, the greater the longer slump loss.In order to solve this problem, Tongya company according to the proportion of the concrete mixture to add two admixtures to adjust the slump, or in admixtures to add a considerable part of retarder, to delay the cement hydration rate to maintain the loss of slump, to meet the construction needs of each site.

As we all know, high temperature will accelerate cement hydration condensation, humidity is low, wind speed will accelerate the water loss of concrete.In order to improve the quality of concrete production and placement in hot climates, the concrete mixing, transportation and placement process is closely linked to the irrigation schedule of the construction group's project departments.They prepare enough raw materials, and once they receive the demand notice, they will speed up production, transportation and pouring, so as to reduce transportation and pouring time.At the same time, they suggest that construction units avoid the midday high temperature period, as far as possible choose to pour in the morning or evening, to ensure that the construction of concrete pouring quality is good, fast.

Ensure the quality of raw materials.In addition to increasing the incoming quality control of sand and stone raw materials, Tongya Company should reduce the dosage of cement, increase the dosage of fly ash and mineral powder, increase the retarded components of admixtures, control the water consumption of single-sided concrete, reduce the water-cement ratio, reduce the slump loss rate, and reduce plastic shrinkage and cracking after testing and matching in the laboratory.Under the condition of pouring conditions, the aggregate particle size should be increased and water should be sprinkled into the aggregate pile to promote the temperature of evaporative cooling sand and stone to reduce the outlet temperature of concrete. The concrete is mixed with cold water and cement whose temperature does not exceed 60℃.As a result of adopting the above measures, the concrete quality pass rate reached 100%.