SU687025A1 - Concrete mixture - Google Patents

Description

The invention relates to the field of construction and the building materials industry and can be used in the manufacture of concrete with curing, which occurs at negative temperatures. Concrete mixtures with additives are known, in which calcium chloride is used as an antifrosty additive. A concrete mixture is also known, including cement - 15-22%, sand 15-32%, crushed stone 4251%, water and addition of sodium chloride 0.51, 5%. This concrete mix is closest to the proposed technical essence and the achieved result. The disadvantages of the known mixtures are low strength, frost resistance, water resistance at negative temperatures of hardening of concrete and insufficiently low negative temperatures of use. The aim of the invention is to increase the penetrability, frost resistance, water resistance at negative temperatures of the token hardening. This is achieved by the fact that a concrete mixture, including cement, sand, crushed stone, water and an additive, contains as an additive the waste of superphosphate production at the following ratio of components, wt.%: 15.0-22.7 32.9-15.5 42 , 2-51.6 Waste of superphosphate production1, 0-1.6 of the rest of the plant, Water The waste of superphosphate production includes the following components, in parts by weight: Sodium chloride5-6 Sodium carbonate3-4 Sodium sulfate 0.8-0.9 Trisodium phosphate0 1-0.2. Example. A concrete mix is prepared from a dlamen of Portland Port 400 grade of the Shdolsky plant, sand, characterized by μr 2.5, crushed stone of hard rocks of a fraction of 10-20 mm, water and additives, with a mobility of 1 cm.

3687025

In the known concrete mix, sodium chloride is used as an additive, in the proposed concrete mix - waste of superphosphate production. Production waste is dissolved in the water of the indentation and introduced with it into the mixture of cel and sticks. Concrete is produced at -15 ° C.

Table 1 shows the compositions of concrete mixes.

In tab. 2 shows the properties of concrete and offers and known concrete mix.

From the data presented in the table, a significant increase in the tensile strength of concrete under compression, frost resistance, and water resistance when cured under conditions of negative temperatures is seen. Table 1

Claims (1)

Invention Formula Concrete mixture, including cement, sand, crushed stone, water and additive, is characterized in that, in order to increase strength, frost resistance, water resistance at negative temperatures of concrete, it contains waste as an additive superphosphate production of the following ratio of components, wt.%: 15.0-22,7 Cement 32.9-15.5 Sand 42.2-51.6 Rubble Waste of superphosphate production1, 0-1.6 of the rest. Water