A cement concrete water reducing agent suitable for machine-made sand
A technology of cement concrete and water reducer, which is applied in the field of cement concrete water reducer, which can solve the problems of large flow resistance and roughness of fresh concrete, and reduced service life and durability of cement concrete, so as to be suitable for long-term storage and reduce flow Resistance, effect of improving fluidity
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Embodiment 1
[0012] A concrete water reducer suitable for machine-made sand, consisting of the following components in parts by weight: 60 parts of carboxylated styrene-butadiene rubber powder, 14 parts of fatty acid potassium soap, 10 parts of potato starch, and 18 parts of sodium hydroxide solution with a mass concentration of 15% parts, stir to mix evenly. The particle size of carboxylated styrene-butadiene rubber powder is 0.05μm~1.15μm, the bulk density is 400g / L~600g / L, and the minimum film-forming temperature is 0℃.
[0013] The mixing amount is 1.5% of the cement mass in the concrete to achieve the same slump (180mm), the water reducing efficiency is 25%, and the 28-day compressive strength is 40.5MPa.
Embodiment 2
[0015] A concrete water-reducing agent suitable for machine-made sand, consisting of the following components in parts by weight: 40 parts of carboxylated styrene-butadiene rubber powder, 10 parts of fatty acid potassium soap, 25 parts of cornstarch, and 40 parts of sodium hydroxide solution with a mass concentration of 10%. parts, stir to mix evenly. The particle size of carboxylated styrene-butadiene rubber powder is 0.05μm~1.15μm, the bulk density is 400g / L~600g / L, and the minimum film-forming temperature is 0℃.
[0016] The mixing amount is 1.5% of the cement mass in the concrete to achieve the same slump (180mm), the water reducing efficiency is 28%, and the 28-day compressive strength is 39.7MPa.
Embodiment 3
[0018] A concrete water reducer suitable for machine-made sand, which consists of the following components in parts by weight: 15 parts of carboxylated styrene-butadiene rubber powder, 20 parts of fatty acid potassium soap, 10 parts of corn starch, 20 parts of potato starch, and a mass concentration of 20% 10 parts of sodium hydroxide solution, stirred and mixed evenly. The particle size of carboxylated styrene-butadiene rubber powder is 0.05μm~1.15μm, the bulk density is 400g / L~600g / L, and the minimum film-forming temperature is 0℃.
[0019] The mixing amount is 1.5% of the cement mass in the concrete to achieve the same slump (180mm), the water reducing efficiency is 22%, and the 28-day compressive strength is 41.4MPa.
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