SU1122637A1 - Raw mix for preparing light-weight concrete - Google Patents

Abstract

HEATING MIXTURE FOR MAKING LIGHT CONCRETE, including phosphate binder, expanded clay gravel, and an additive that is characterized in order to increase heat resistance and improve workability. it contains as an additive trichloroethyl phosphate and additionally spent catalyst for the production of synthetic rubber in the following ratio, wt.%: Phosphate binder 8-13 Trichloroethyl phosphate 2, 0-3.5 Waste catalyst for the production of synthetic SP 32-44 Ceramsite Rubber Rest Gravel

Description

0 e:: oh The invention relates to the production of light heat-resistant concretes and can be used for heat insulation of industrial furnaces. Light concrete mix is known, inclusive),% by weight: expanded clay 40-50, chromate phosphate binder 25-30, technical alumina 25-30 l. The disadvantages of this mixture are low heat resistance, poor housekeeping and high consumption of phosphate binder. The closest to the invention is the raw mix for lightweight refractory concrete, containing wt.%: Phosphate binder 17-29, clay refractory 5-7.0, chamotte 10-3 fly ash 13-20, aluminum hydroxide 5-15, gravel expanded clay else 21. The disadvantages of the known raw material mixture are poor workability of the mixture, limited raw materials and low temperature resistance of the resulting products. The aim of the invention is to increase the heat resistance and improve the workability of concrete. This goal is achieved by the fact that the raw mix for making lightweight concrete, including fath binder, expanded clay gravel and additive, contains as an additive trichloroethyl phosphate and additionally spent synthetic rubber production catalyst in the following ratio of components, wt.%: Phosphate binder Spent catalyst for the production of synthetic rubber Trichloroethyl 2, 0-3.5 phosphate Expanded clay The rest is gravel. Spent catalyst for the production of synthetic rubber has the following content: of the main oxidizing wt%: 70;. , Si02 U Trichloroethyl Phosphate (THEP) promotes the polycondensation of a phosphate binder, which actively interacts with the spent catalyst and forms the supporting framework for resistant material in which the grains of expanded clay are evenly distributed. As a result of the composition hardening reaction and heating during operation, a heat-resistant material homogeneous in its physicochemical properties and devoid of internal thermal stresses is obtained. The physico-chemical uniformity of the material obtained ensures its enhanced heat resistance. The use of the spent catalyst in the composition allows the disposal of waste from the production of synthetic rubber, which is currently accumulated in the dumps in the factories, and the use of scarce refractory raw materials (fireclay clay). Thus, the raw material base for the production of refractory products from the proposed lightweight concrete mixture is significantly expanded. The introduction of THPC into the light concrete mixture qualitatively changes the physicochemical properties of the phosphate binder, first of all, sharply reducing the viscosity, which significantly improves the workability of the mixture and reduces the binder consumption. PRI me R 1, In a forced mixer, a mixture of the following composition is prepared, in wt.%: From. worked catalyst for the production of synthetic rubber 32 / orthophosphoric acid 8j trichloroethyl phosphate (THEP) 2. After stirring for 2-3 minutes, 58% by weight of expanded clay gravel 5-30 mm is added to the mixture and the mixing is continued for another 2-3 minutes. The lightweight concrete mixture is placed in metal molds and compacted on a vibrating plate for 90 s. Thermoformed molded products in the molds at 130-150 ° C for 12-14 h, after which they are ready for operation. Example 2. A mixture of composition, wt.%, Is prepared: spent catalyst 39, orthophosphoric acid 10J THAP 3, haydite 48. The mixing procedure and manufacturing techniques are similar to Example 1. EXAMPLE 3: A mixture of composition, wt. .%: spent catalyst 445 orthophosphoric acid 13, THAP 3.5, expanded clay gravel 39.5.

Mixing procedures and manufacturing techniques are similar to Example 1.

EXAMPLE 4 A mixture of the composition, in wt.%, Is prepared: spent catalyst 38, aluminum-chromophosphate binder 11, THEP 3; expanded clay gravel 48. Mixing order and manufacturing techniques are similar to Example 1.

PRI me R 5. Prepare a mixture of composition, wt.%: Spent catalyst 40i aluminophosphate binder 12f

THEP 3, expanded clay gravel 45. Mixing order and manufacturing techniques are similar to Example 1.

The main physicomechanical and thermophysical characteristics of the material obtained in comparison with the known n {shown in the table.

As in the table, the proposed formulations on different phosphate binders are superior to limestone in all basic properties.

Seeming with density

kg / m 1050 1100 1150 14.8

15.1 15.3 145

140 130

Comfortability

(compaction time

in standard cylinder., с75 65 55

1150

1100 1100

14.5

15.1 15.0

140

140

108

60

165

60;

Claims (2)

RAW MIXTURE FOR PRODUCTION OF LIGHT CONCRETE, including phosphate binder, expanded clay gravel and additive, characterized in that, in order to increase heat resistance and improve workability ^ it contains trichloroethyl phosphate and an additional spent catalyst for the production of synthetic rubber as an additive in the following synthetic rubber .%: Phosphate Binder Trichlorethylphosphate Spent Synthetic Rubber Catalyst Expanded Clay • Gravel 8-13 2.0-3.5 32-44 Rest