| 摘要 |
FIELD: construction.SUBSTANCE: high-strength concrete consisting of a mixture containing Portland cement, sand, crushed stone, a silica-containing component, an additive and water, contains quartz sand with fineness modulus M=2.26, granite crushed stone with particle size of 5-10 mm, silica-containing component - sol HSiOwith density ?=1.014 g/cmand pH=4±0.5, an additive - a water solution with density ?=1.04 g/cmand pH=7.0±0.5, consisting of a polycarboxylate polymer based on methacrylic acid with density ?=0.95 g/cm, pH=7±0.5, calcium formate (HCOO)Ca, sodium nitrate NaNO, a SAS mixture based on ethoxylated fatty alcohols and branched alkyl sulphates with density ?=1.03 g/cmand pH=7±1.0 and water at the following additive component ratio, wt %: polycarboxylate polymer based on methacrylic acid with density ?=0.95 g/cmand pH=7±0.5 - 21.0-25.0; calcium formate (HCOO)Ca - 2.5-3.0; sodium nitrate NaNO- 5.0-6.0; the SAS mixture based on ethoxylated fatty alcohols and branched alkyl sulphates - 6.5-7.0; water - 61.0-63.0 at the specified component ratio of a concrete mix for high-strength concrete.EFFECT: increasing freeze resistance and a coefficient of corrosion resistance of concrete hardening at negative temperature relative to the prototype.2 tbl |
