SU808423A1 - Binder - Google Patents

Description

The invention relates to the production technology of building materials, namely to the production of fixed materials based on portlan cement. Hydraulic substances are known, including Portland cement clinker, gypsum and active mineral additive 1. Silica-containing sedimentary rocks, ashes, slags are used as an active mineral additive. The closest to the technical essence and the achieved effect to the proposed is stagnant, including portland pendant clinker, gypsum and active mineral additive Tripoli, with the following component ratios, wt.%: Tripoli 5-30, gypsum 3-5, Portland cement clinker 2 The disadvantage of people living with this additive is the slow interaction of the hydration products of the minerals of portland cement clinker with the additive, which leads to carry; l but low strength in the hard at the early stages of hardening. The purpose of the invention is to increase the progression of the ghost. The goal is achieved by the fact that, including portland cement clinker, gypsum and active mineral additive, the active mineral additive contains natural mineral actinolite at the following component ratios, wt.%: Gypsum3-5 Actinolite1-15 Portland cement clinker is a calcium-magnesium hydrosilicate group of amphiboles and has the structural formula Ca2 (MgFe) j- (OHj) S fg Oj. Its chemical composition, wt.%: 510, 7-, FeO 0.1-42.7; MgO 0.1-28.8 CaO 13.45; Nur to 3. Mineral crystals have a fibrous structure and a developed surface, which causes their large adsorption capacity of ps to Ca ions. The parameters of the cell of the crystal lattice of the mineral are close to the corresponding parameters of calcium hydrosilicates, formed during the hardening of the binder, therefore, the crystals of actiiolite can serve as a substrate for the crystallization of additional quantities of hydrate

neoplasms that increase the strength of a gust.

Actinolite is introduced into the composition during grinding. The hardness of the mineral is low, therefore, with joint grinding with Portland cement clinker and gypsum, it is part of the smallest fractions in the slant.

Example. Clinker cement plant Giant and gypsum in the ratio, wt.% Clinker 96; gypsum 4 is mixed and milled in a ball mill to 5 h | d 3000. The resulting shutter is filled with water at, 40, and molded samples are 1x1x3 cm. Beam samples are air-wet. Samples are tested at ages 1, 3.7 and 28 days.

Example 2. Compound mixed, wt.%: Clinker of cement plant Giant 91; gypsum 4; Tripoli 5. Preparing technologies in manufacturing, production, storage and testing of samples as described in example 1.

Example 3-6. Get mixed in the living, the compositions of which are presented in table. one.

The preparation, storage, testing and sample making techniques are similar to examples 1-2.

The strength characteristics of the samples in examples 1-6 are presented in table. 2

As can be seen from the table, the grip with active mineral additive - actnolit has strength at the age of 1 day at bending - at 2.43, at compression - at 2.48 times and at the age of 28 sous at bending - at 1.22 at compression - 1.43 times more than that of the famous one.

The results obtained make it possible to relate the proposed high-speed, fast-hardening, with a brand strength of 550 and 600. The use of high-flow concrete and concrete products makes it possible to reduce their oashol by 40-60 kg per 1 mb of concrete, which is 1 million m of concrete per year gives the economic effect 450500 thousand rubles.

Table

2.25.07,, 0

2,1.5,47,61,6

Table

9.02, O34.545.0

8, 33,946,9

Claims (2)

1.Volzhenskiy A.V. and others. Mineral substances M., Higher School, 1973, p. 167. 2. Butt, Yu. M. and others. Technologists in the burning substances. M., Higher School 1965, p. 538-546.