There is a direct proportional relationship between workability and the good performance of concrete mechanical properties, and the quality of concrete raw materials has a direct impact on workability.
Therefore, choosing high-quality and stable raw materials is an important prerequisite for the smooth pouring of concrete.
After comprehensive consideration, 42.
5 grade Portland cement is used as the cement type, continuous graded crushed stone 5-20mm is used as the coarse aggregate, river sand (medium sand) is used as the fine aggregate, the fineness modulus is 2.
8 (continuous grading), the average particle size is 0.
2-0.
5mm, and tap water is used as the water.
The component indicators for preparing concrete pumping agent are shown in Table 1.
.