Micro-expansion super early-strength bearing grout
A super-early-strength, grouting material technology, applied in construction, building maintenance, bridges, etc., can solve the problems of unable to meet the rapid anchoring and repair of concrete components, prolong the turnover period of equipment, and the support connection is not tight, etc., to achieve construction Good performance, no decrease in strength, no impact on the construction period
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Embodiment 1
[0010] First weigh the raw materials: 30kg of cement, 60kg of sand, 0.5kg of water reducer, 2kg of expansion agent, 0.1kg of retarder, and 10kg of reinforcing agent. Then put the sand, water reducer, expansion agent, retarder, and reinforcing agent into the mixer and mix for 5-10 minutes, then put the cement into the mixer evenly, continue to mix for 10-20 minutes, and finally pack it into bags.
[0011] When using, add 14% water according to the weight percentage, mechanically stir for 3-5 minutes, and then cast. The obtained grouting material has an initial fluidity of 330mm, a fluidity of 260mm in 30min, a compressive strength of 22.3MPa in 2h, a flexural strength of 10.6MPa in 24h, a compressive strength of 56.7MPa in 28d, and an expansion rate of 0.03% in 28d.
Embodiment 2
[0013] First weigh the raw materials: 40kg of cement, 50kg of sand, 1.5kg of water reducer, 3kg of expansion agent, 0.3kg of retarder, and 7kg of reinforcing agent. Then put the sand, water reducer, expansion agent, retarder, and reinforcing agent into the mixer and mix for 5-10 minutes, then put the cement into the mixer evenly, continue to mix for 10-20 minutes, and finally pack it into bags.
[0014] When using, add 15% water according to the weight percentage, mechanically stir for 3-5 minutes, and then cast. The obtained grouting material has an initial fluidity of 340mm, a fluidity of 265mm in 30min, a compressive strength of 26.1MPa in 2h, a flexural strength of 11.4MPa in 24h, a compressive strength of 58.7MPa in 28d, and an expansion rate of 0.04% in 28d.
Embodiment 3
[0016] First weigh the raw materials: 50kg of cement, 40kg of sand, 2.5kg of water reducer, 4kg of expansion agent, 0.5kg of retarder, and 5kg of reinforcing agent. Then put the sand, water reducer, expansion agent, retarder, and reinforcing agent into the mixer and mix for 5-10 minutes, then put the cement into the mixer evenly, continue to mix for 10-20 minutes, and finally pack it into bags.
[0017] When using, add 16% water according to the weight percentage, mechanically stir for 3-5 minutes, and then cast. The obtained grouting material has an initial fluidity of 335mm, a fluidity of 245mm in 30min, a compressive strength of 22.8MPa in 2h, a flexural strength of 10.7MPa in 24h, a compressive strength of 54.2MPa in 28d, and an expansion rate of 0.03% in 28d.
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