砼的配比委托试验室设计。砼配比设计时应根据本地区砼砼材料的实际情况进行

The ratio of concrete was commissioned to the laboratory to design. The design of the concrete ratio should be carried out according to the actual situation of the concrete materials in the region. Several schemes should be made for the ratio of high-strength concrete to be tested and matched, so as to select the most guaranteed quality, economical and reasonable ratio as the on-site construction ratio. It is required that the slump of the design ratio concrete is controlled at 18cm, the initial setting time is controlled at about 5 hours, and the concrete reaches more than 80% of the design strength within 5 days to meet the requirements of slab prestressing. In order to ensure that the actual strength of the high concrete meets the design requirements, the high-strength YNB-6 admixture is added to the concrete.

The ratio of the crucion is delegated to the laboratory design. The ratio should be designed according to the actual situation of the material in the area. The requirements of high-strength ratio should do several programs for trial matching ratio, in order to choose the most assured quality, economical and reasonable matching as on-site construction matching. The collapse degree of the design ratio is required to be controlled at 18cm, the initial condensation time is controlled at about 5 hours, and the 5 days reach more than 80% of the design strength to meet the requirements of plate prestress tensor. In order to ensure that the actual strength of the high crucion meets the design requirements, a high-strength YNB-6 admide is added to the radon.

The proportion of concrete is designed by laboratory. The concrete mix design should be based on the actual situation of the local concrete materials. It is required that several schemes should be made for trial mix of high strength concrete, so as to select the most quality guaranteed, economic and reasonable mix as the site construction mix. It is required that the slump of the designed mix concrete should be controlled at 18 cm, the initial setting time should be controlled at about 5 hours, and the concrete should reach more than 80% of the designed strength in 5 days, so as to meet the requirements of prestressed plate tension. In order to ensure the actual strength of high concrete to meet the design requirements, high strength ynb-6 admixture is added into the concrete.<br>