Seawater corrosion resisting mineral additive for concrete, and preparation method thereof
A mineral admixture, anti-seawater technology, applied in the field of concrete admixture, can solve the problems of complex operation, troublesome use, lack of anti-freezing and thawing cycles, etc., and achieve the effect of prolonging service life and good corrosion resistance
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Embodiment 1
[0050] According to weight percentage, weigh 30% of anhydrous calcium sulfoaluminate mineral, 20% of anhydrite, 20% of calcined diatomite, 14% of natural pozzolan, 10% of quartz powder, and grind together until the specific surface area is 410m 2 / kg, 1.2% remaining on 0.08mm square hole sieve; then mixed with 3% of rust inhibitor, 0.1% of air-entraining agent, 0.4% of cellulose, and 2.5% of calcium stearate to obtain the product.
Embodiment 2
[0052] According to weight percentage, weigh 20% of anhydrous calcium sulfoaluminate mineral, 15% of anhydrite, 30% of calcined diatomite, 17.85% of natural pozzolan, and 15% of quartz powder, and grind them together until the specific surface area is 350m 2 / kg, 0.08mm square hole sieve remaining 1.8%; then mixed with 1% of rust inhibitor, 0.05% of air-entraining agent, 0.1% of cellulose, and 1% of calcium stearate to obtain the product.
Embodiment 3
[0054] By weight percentage, weigh 15% of anhydrous calcium sulfoaluminate mineral, 10% of anhydrite, 20% of calcined diatomite, 24.5% of natural pozzolan, and 25% of quartz powder, and grind together until the specific surface area is 450m2 / kg, 0.08 mm square hole sieve with 0.6% remaining; then add 1% rust inhibitor, 0.1% air-entraining agent, 0.5% cellulose, 4% calcium stearate, and mix well to obtain the product.
[0055] Anti-corrosion performance test:
[0056] In order to compare the effects of seawater erosion resistance admixtures on different cements, the test determined the strength, expansion and contraction, erosion resistance, wear resistance of the following several concrete seawater erosion resistance mineral admixtures (HCRA) on different cement varieties under the same amount. The role of performance and work performance. The test is carried out according to GB / T 749-2008 "Test Method for Cement Sulfate Erosion Resistance", GBJ82-1985 "Test Method for Long-t...
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