SU772997A1 - Binder - Google Patents

Description

(54) BINDING

The invention relates to construction materials, namely, compositions in the halves based on semi-plaster gypsum. Known mineral sting-based gypsum, including semi-aquatic gypsum, magnesium oxide, phosphoric acid salt in the following ratio of components, wt.%: Semi-aquatic gypsum 40-90 magnesium oxide 9.9-50 Salt of phosphoric acid, 0.1-10 Ll. The closest to the technical essence and the achieved effect. To the proposed - stinging 2, which includes semi-aquatic gypsum and the addition of phosphoric anhydride at the following ratio of components, weight.H: Semi-aquatic gypsum 1 Phosphoric anhydride 0.005-0.1 strength. This does not allow it to be used for the manufacture of structures and products. The purpose of this invention is to increase strength, stabilize setting TERMS. The goal is achieved by staking, including semi-aquatic gypsum and an additive as an additive. contains calcined at 900950 0 solid residue of soda production in the following ratio of components, wt.%: Semi-aquatic gypsum 46.3-80,5. Annealed solid residue waste soda production 19,5-53,7 The chemical composition of the burned solid residue waste soda production used in the proposed tine,%; . 35L7 2.45 1.26 PPP Mixtures are prepared by mixing components with a specific surface of 3500 ctf / f, samples of 4x4x; 4 cm are prepared from these compositions, which are subjected to drying.

at 60-120C. The water ratio is selected based on the conditions for ensuring the normal thickness of the dough. It is 0.4-0.52,

As can be seen from the table. 1 the strength of the stone from the specified to the surplus exceeds the strength of the stone from building plaster by 50-100%. In addition, a significant stabilization of the setting time of the prepared dough is noted. In the samples made from the proposed in the suspect, during drying, no cracks were observed, while in samples from gypsum plaster, the cracks were observed during drying.

Increased stone strength, stable time of the beginning and end of hardening samples after 1.5 hours of curing are tested in accordance with the requirements of GOST 125-70. The test results are given in table. one.

Table

The washing of the proposed binder makes it possible to obtain rolled products.

Production technology is no different from the usual.

On the optimal composition, solutions and concretes are selected and their physical and mechanical characteristics are evaluated.

40 The test results are shown in Table. 2

Table 2

The stable setting time of the mixture, the end of setting of which does not exceed 10 minutes, with a relatively high initial strength, allows for the removal of products from the mill without destruction.

The manufacture of products is carried out according to the usual technology for rolling mills, followed by drying in chambers with coolant at 100-120 seconds for 10-12 hours.

The application of the proposed raw material; based on semi-aquatic gypsum and calcined solid residue of soda production as a mortar for concretes, enclosures, sound-insulating products such as gypsum-concrete, large-sized basement under the floors, will allow to obtain a large environmental protection effect; strangers (, construction gypsum, cement pozzolanov)

In addition, recycling of industrial waste is possible.

Claims (2)

1. USSR author's certificate  381627, class From 04 to 7/04, 13.05.71. 2. USSR author's certificate 0 310876, class From 04 to 7/04, 1969.