Double sealed circulation pump precautions
Double sealed circulating pump precautions 1, double sealed circulating pump in the installation of the pump chassis and ground to install a fixed foundation, not loose. 2, Check the pump before using the components, bolts loose, check the direction of rotation is correct. 3, the use must be connected to the pump shaft seal at the cooling water pipe, should be filled with liquid before starting, prohibit reverse. 4, no abnormal sound during operation, such as abnormal noise found abnormalities, should be promptly repaired.
Auxiliary Agent For Concrete Retarder
Classification by structure:
(1) Sugar: sugar calcium, gluconate, etc
(2) Citric acid, tartaric acid and their salts
(3) Zinc salt and phosphate
(4) lignosulfonate
Hardening effect
(1) Influence on strength, excessive incorporation will cause the concrete to remain unsolidified for 24 hours or even 72 hours, thus affecting the need for early strength of concrete and delaying the construction progress. No obvious effect was found on the concrete of suitable age.
(2) The effect on contraction, the appropriate use of the contraction has no significant effect. Excessive use will cause the top concrete to dry and shrink due to excessive water evaporation and shrinkage cracks.
(3) The effect on frost resistance durability is similar to that of concrete without adding retarder. [1]
Detection index
Increased turnover: 8
Initial setting time difference: +60~+120
Compressive strength ratio 7 days: 120
Compressive strength ratio 28 days: 120
Softening coefficient: 0.55
Auxiliary Agent For Concrete Retarder,retarding agent,set Retarder
Shanghai Hongyun New Construction Materials Co., Ltd , https://www.hongyunpce.com