Superfine quick-setting self-compacting repair mortar and preparation method thereof
A repairing mortar and self-compacting technology is applied in the field of building materials to achieve the effects of ensuring compactness, large static expansion, and improving interface bending and tensile strength and bonding strength.
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Embodiment 1
[0029] Specific surface area 600m 2 / Kg low alkalinity sulfoaluminate cement: 55.0% (mass percentage); quartz sand: 35.0%; specific surface area 580m 2 / Kg Ordinary Portland cement: 3.9%; specific surface area 500m 2 / Kg slag powder: 4.5%; vinyl acetate and ethylene copolymer rubber powder: 1.06%; SD-600P-F polycarboxylate superplasticizer: 0.25%; citric acid and hydroxypropyl methylcellulose ether mass ratio 1.5 :1 mixing: 0.28%; ML-861-6 powder defoamer for concrete: 0.01%.
[0030] When using on site, mix the repair mortar powder and water at a ratio of 1:0.160 and stir evenly. Referring to "Repair Mortar" JC / T2381-2016, the measured static expansion of the machine is 300mm, the initial setting time is 15min, the final setting time is 20min, the 6h compressive strength is 33.5MPa, and the 24h compressive strength is 530.5MPa , 28d compressive strength is 78.5MPa, 1d interface flexural tensile strength is 3.8MPa, 3d interface flexural tensile strength is 5.9MPa, 28d inter...
Embodiment 2
[0032] Specific surface area 600m 2 / Kg low alkalinity sulfoaluminate cement: 35.0%; quartz sand: 55.0%; specific surface area 600m 2 / Kg Ordinary Portland cement: 4.8%; specific surface area 25000m 2 / Kg silica fume: 1.3%; specific surface area 600m 2 / Kg slag powder: 2.0%; vinyl acetate homopolymer rubber powder: 1.10%; SD-600P-F polycarboxylate superplasticizer: 0.50%; citric acid and hydroxypropyl methylcellulose ether mass ratio 1.4: 1 Mixing: 0.25%; ML-861-6 powder defoamer for concrete: 0.05%.
[0033]When using on site, mix the repair mortar powder and water at a ratio of 1:0.150 and stir evenly. The measured static expansion of the machine is 330mm, the initial setting time is 13min, the final setting time is 21min, the 6h compressive strength is 22.4MPa, the 24h compressive strength is 45.2MPa, the 28d compressive strength is 68.5MPa, and the 1d interface The flexural tensile strength is 3.4MPa, the 3d interface flexural tensile strength is 5.4MPa, the 28d interf...
Embodiment 3
[0035] Specific surface area 560m 2 / Kg low alkalinity sulfoaluminate cement: 39.4% (mass percentage); quartz sand: 50.0%; specific surface area 550m 2 / Kg Ordinary Portland cement: 2.5%; specific surface area 22000m 2 / Kg silica fume: 2.5%; specific surface area 2500m 2 / Kg beads: 3.0%; acrylate and styrene copolymer powder: 2.00%; SD-600P-F polycarboxylate superplasticizer: 0.32%; citric acid and hydroxypropyl methylcellulose ether mass ratio 1.3 :1 mixing: 0.25%; ML-861-6 powder defoamer for concrete: 0.03%.
[0036] When using on site, mix the repair mortar powder and water at a ratio of 1:0.150 and stir evenly. The measured static expansion of the machine is 320mm, the initial setting time is 14min, the final setting time is 20min, the compressive strength at 6h is 25.9MPa, the compressive strength at 24h is 49.5MPa, the compressive strength at 28d is 72.5MPa, and the interface of 1d The flexural tensile strength is 3.5MPa, the 3d interface flexural tensile strength i...
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