| 摘要 |
The invention relates to the building materials and is used for preparation of light-weight high-tensile concrete. Summary of the invention consists in that the composition comprises a mix of ingredients, in mass %:Portland cement��15...20sand���14...20finely ground silica��3...15crushed stone with the fraction 5...15 mm�20...40superplasticizer on base of ether polycarboxylates�1...3water���the rest,and light filler of spherical form with a dimension of 5...15 mm in the quantity of 13...41% of the mix volume. At the same time, as filler may be used expanded polymers, hollow polymer or glass balls. The result consists in improving the concrete properties, namely the density in the interval 1000...2445 kg/m3 and the compressive strength in the interval 12...85 MPa, thus, combining the properties of the heavy-weight concretes (high strength) with those of the light-weight concretes (low heat exchange).
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