A; Features and Uses This product is made of composite material from antifreeze, as a gray powder, pH, 8-9, both antifreeze and water-reducing effect. In the negative temperature conditions, with a strong antifreeze capabilities, and concrete with high early strength and excellent technical performance. HF composite antifreeze for reinforced concrete construction concrete daily minimum temperature of -5 ~ -15 ℃ in winter, high slump concrete and pumping concrete. Two; the technical performance of a product; this product has reduced freezing effect and has a good water-reducing effect, reducing the water rate of up to 8%. Cited air D50o negative temperature conditions under pouring concrete, seven days up to 50% of the design strength of the label, 28 days strength up to 80% of the design strength, even in the negative temperature, the intensity still increased 28 days later. As a negative into a positive temperature curing temperature and curing 28 days 28 days, strength exceeds design standards. 2; This product has frost, rust and reduction of water features, no corrosion of steel effect. 3; cement varieties adaptable for a variety of cement. 4; This product complies with JC 475-92 "concrete antifreeze." Three; construction methods and precautions 1; Volume: 3% -4% of cement consumption - below 10 ℃ can be mixed with 6 percent. Content should not be too large, in order to avoid excessive concrete surface from frost. 2; the FDA should be adopted before the test with the test, to determine the optimal mix concrete. 3; when positive temperature under a dry powder can be directly incorporated, dissolve with water at about 60 ℃ under negative temperature use. Mixing water temperature should be appropriate, generally controlled at 40 ^ 50 ℃ appropriate. 4; antifreeze such as moisture caking, should be crushed and sieved after use, the effect is the same. 5; antifreeze concreting should be noted that after covering maintenance, shall watering. Higher than the initial curing temperature is below -3 degrees, should take cover mats or plastic film insulation measures. Four; packaging and storage 1; This product is mounted on the inner plastic bag, net weight 40KG or 25KG. 2; This product should be stored in dry and ventilated warehouse, not damp. After the moisture can match the solution to use. Storage is valid for one year, after the expiration of concrete test subject, depending on the result of continued use.