SU958369A1 - Composition for making construction materials - Google Patents

Description

one

The invention relates to compositions based on hydraulic cements and can be used in the preparation of mortars, concretes and the manufacture of building products.

A known composition for the manufacture of building materials f1}, comprising, mash: portland cement 1015 and natural quartz filler, Q Tel 85-90.

The lack of composition - slow hardening.

Closest to the present invention is a composition for manufacture. at building materials,. including Portland Cement T7-50 and anhydrite aggregate with a fraction up to 5 mm 50-83. The filler contains 15-20 wt. dust (fraction 0, nd mmbo) This composition has a compressive strength of 76–110 kgf / cm every other day.

However, this composition is characterized by a low npOMHOCtbe

The purpose of the invention is to increase the strength. The objective set is achieved by the fact that a composition for the manufacture of building materials, comprising Portland cement and anhydrite aggregate of fractions 0.1 and 0, 0 mm, contains these components in the following ratios, mas .: Portland cement 23 -30 Anhydrite aggregate. fractions 0.1 mm 0.1-7.5 fractions 0, 0 mm 62.5-76.9 The proposed composition is characterized by compressive strength from 329 kG / cm to 388 kgf / cm with accelerated hardening (after 24 hours is IlA kgf / cm, according to the prototype - T10 kgf / cm, after 7 days 35 CSP of the prototype - 289 kgf / cm). Note Natural anhydrite stone was crushed to a particle size of 5 mi. The crushed stone is divided into a sieve 39583694 O, into two fractions of O, mm and the method of GOST Yu-BO. Methods ispta0 mm. Anhydrite fractions of cement mixtures, rolled with Portland cement of the ZOO brand at various ratios. The obtained Tests of compositions for durable compositions are shut off with water and samples — baloks k × — are preliminarily formulated at boundary and average values. K x 16 cm of the available and known ratio of the test of beams to mechanical pro-ponents are given for different drones carried out after hardening into hardening moisture. Noah after 1 day and after hardening. The test results are summarized in either Q water through .T.l and 28 days across the Table.

The proposed composition of PRI me R 1

Table continuation

Claims (1)

Claim The table shows that the strength of the proposed composition (when containing 0.14 mm fractions from 0.1 to 7.5?) ²⁵ is 330-388 kgf / cm ¹ ® ·, the strength of the composition according to the prototype (when the content of fraction 0 , 14 mm 11-15 ?? under similar hardening conditions is equal to 286-329 kgf / cm, i.e. the composition of the proposed composition allows to increase its strength by 15 “18 ?. Strength increases in the early stages of hardening. For example, during the first days of hardening, the proposed composition gains strength up to 93 “144 kgf / cm ^, the composition of the prototype, respectively 75“ 1t0 kgf / cm. The highest strength (388 kgf / cm ^L under compression and 75 kgf / cm before bending) the proposed composition has a fraction in it of 0.014 mm 0.8 May.?. The proposed composition does not collapse upon prolonged exposure to .45 water (more than 1 year), and the known * under these conditions crack. This allows us to prepare high-quality building compositions with high frost resistance (at least 100 alternating cycles of 55 hours) from unused and unused waste from mining of anhydrite stone _{$ 0} in combination with Portland cement Order 6968/30 it contains the following stock23-30 0.1-7.5 62.5-76.9 Composition for the manufacture of building materials, including Portland cement anhydrite aggregate fractions of 0.14 and 0.14-5y0 mm, characterized in that, in order to increase strength, these components of the relationship, May.?: Portland cement Anhydrite aggregate ¹ fraction 0.14. mm fractions 0.145.0 none