SU1381098A1 - Binder for mortar and concrete mixes - Google Patents

Abstract

The invention relates to the production of building materials, to the compositions in which the buildings are assembled for the manufacture of prefabricated reinforced concrete products. The aim of the invention is to obtain a nonshrinkable cracking resistance. In mortars for mortar and concrete mixtures it includes, in wt.%: Portlaud cement 94.69-99.85; one stripped molasses of the postpartum bard 0.05-0.3; sodium sulfate or alkali metal bicarbonate 0.05-5, O; aluminum powder 0.01-0.05. The resulting concrete is characterized by plastic shrinkage O, the crack resistance coefficient is 0.93-0.98. 2 tab. 5 cl

Description

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11381098

The invention relates to the manufacture of building materials, namely, compositions in housings used for the manufacture of precast concrete products and structures.

The purpose of the invention is to shrink the non-shrinking stitch with a crack resistance.

Concrete mixes with the known and proposed in the breech are prepared by the following technology.

Portland cement, an additive, coarse and fine aggregate are introduced into the mixer and mixed for 3 minutes. Then mixing water is supplied to the mixer, the components are mixed, and the resulting mixture is stirred for another 5 minutes. The following building materials were used in the work: cement of the Belgorod plant of the M500 brand, crushed stone granite fr.

5-20 mm, ravine sand with, 35. Samples were prepared from a concrete mixture of composition B: P: Sch 1.0: 1.73; 3.12; V / C 0.84.

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The evaporated molasses of the post-harvest bard (FB) corresponds to OST 18-126-83.

The compositions of the known and proposed to the shearer are presented in Table 1, and the properties of concrete are shown in Table 2 (examples of Table 1, indicating the relationship between Portland cement and the additive, correspond to examples of concrete mixtures according to

Table 2).

Claims (1)

Claims for mortar and concrete mixes, including Portland cement, one stripped off molasses post-yeast bard, salt — sodium sulfate or potassium or sodium bicarbonate, which additionally contains aluminum powder in order to obtain a non-shrinking resin stick with increased crack resistance. the ratio of components, wt.%: One stripped off the molasses of the post-seasoned bard 0.05-0.3. The specified salt 0.05-5.0 Aluminum powder 0.01-0.05 Portland Cement Remaining. t and in p and c a 1 0.64 0.04 0, M 0.12 0.0 0.84 0.34 0.09 0.30 0.05 0.57 5.0 0.05 0.18 2.52 0.01 0.05 0.03 0.05 0.13 0.10 0.05 oh | S.O Oh OS I, il o.os 0,0) .o 0.01 o, os 1, "o.ot o, oi about t about about chgo sg  about th 04 about about 00 00 1Ao 00 o chg 1L about m about - 00 o to o fO Ltd “- with U o oh oh about m o - 00 1L about oh oh about go about Ltl sh about ft about