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西班牙研制成高强度混凝土,28天龄期的强度达115兆帕(1兆帕约为10公斤/厘米~2),水泥石的强度达320兆帕)。提出了配制高强度混凝土的建议: 1.强度35～60兆帕的混凝土增加“P-450”水泥的用量(500公斤/米~3以上)。在此基础上,以后每增加水泥用量45公斤/米~3,可提高混凝土强度7兆帕; 水灰比:0:3; 采用塑化剂、经破碎的骨料(细骨料与粗骨料之比要低)。 2.强度60～100兆帕的混凝土增加水泥用量; 水灰比:0.25, 采用超塑化剂(此时用水量降低20%,
Spain has developed high-strength concrete with a strength of 115 MPa (1 MPa, about 10 kg/cm2) at 28 days and a strength of 320 MPa for cement. Suggestions for the preparation of high-strength concrete are proposed: 1. The concrete with strength of 35-60 MPa is increased by the amount of P-450 cement (500 kg/m~3). On this basis, for every 45 kg/m~3 increase of cement dosage in the future, the concrete strength can be increased by 7 MPa; the water-cement ratio: 0:3; using plasticizers, broken aggregates (fine aggregates and coarse bones) The material ratio is lower.) 2. Cement dosage of concrete with strength of 60～100 megapascals; Water-cement ratio: 0.25, using superplasticizer (water consumption is reduced by 20% at this time,