RU2258683C1 - Raw mixture for making building article and construction - Google Patents

Abstract

FIELD: building industry and materials.

SUBSTANCE: raw mixture comprises sulfur, a sulfur modifying agent and filling agent wherein sulfur waste from Nizhnekamski petroleum-processing plant RT is used as sulfur source, water glass is used as a sulfur modifying agent and sand-gravel mixture consisting of 75% of sand-sifting and 25% of gravel is used as a filling agent in the following ratio of component in the raw mixture, wt.-%: indicated sulfur waste, 29-37; water glass, 1-3, and sand-gravel mixture, 60-70. Invention can be used in making floorings, troughs, foundations, footpath and fettling tiles, road barriers, edge stones, other constructions and buildings subjected for acid and salt corrosion.

EFFECT: reduced water absorption, enhanced compression strength.

2 tbl

Description

The invention relates to the building materials industry and may find application in the manufacture of floors, trays, foundations, paving and lining tiles, road fences, side stones, other structures and structures, especially those subject to acid and salt aggression.

A known composition for sulfur concrete containing technical sulfur or sulfur-containing waste modified with additives as an astringent (A.N. Volgushev, N.F. Shesterkina. Production and use of sulfur concrete. Overview, series 1 - M .: TSNIITEMS, 1991, issue 3, p. 5).

The composition has low strength and performance properties.

The closest in composition and effect achieved is the raw material mixture for the manufacture of building products and structures (USSR author's certificate No. 1669895, M class ³ C 04 B 28/36, publ. B. No. 30 of 11/14/08), including .%):

sulfur waste caprolactam production 20-30 screening of granite crushed stone or electrothermophosphoric slag 70-80

However, this composition has insufficient strength and high water absorption.

The invention is directed to reducing water absorption and increasing compressive strength.

The result is achieved in that in a raw mixture containing sulfur, a sulfur modifier and aggregate, sulfur wastes from the Nizhnekamsk oil refinery RT are used as sulfur, liquid glass is used as sulfur modifier, and a sand-gravel mixture consisting of 75% sand is used as aggregate - screening and 25% gravel, with the following ratio of components (wt.%):

sulfur waste 29-37 liquid glass 1-3 Sand and gravel 60-70

Sulfur wastes of the Nizhnekamsk oil refinery RT (GOST 127-93) contain 99.98% sulfur.

As the modifier of sulfur used liquid sodium glass (TU 113-08-00206457-28-93) of the following chemical composition (wt.%):

SiO ₂ 21-24 Fe ₂ O ₃ , Al ₂ O ₃ no more than 0.25 CaO no more than 0.2 Na ₂ O 7.9-8.8

SO ₃ 0.15

Silicate module of liquid glass - 2.7-3.4.

Density - 1.28-1.34 g / cm ³ , pH about 12.

As a filler, a sand-gravel mixture of the Sokolsky deposit of the Republic of Tatarstan of the following grain composition was used.

Fractions 5-2.5 2.5-1 1-0.63 0.63-0.315 0.315-0.16 <0.16 Fineness modulus Quantity your% 12.9 9.03 10.48 48.10 17.71 1.72 2.46

The specified sand-gravel mixture consists of 75% sand-screenings and 25% gravel. Screening sand has the following mineralogical composition (wt.%):

Quartz, feldspar, calcite 97-98 Iron hydroxides 0.3-1.0 Epidote 0.8-1.0

The raw material mixture is prepared as follows: crushed sulfur, water glass and pre-dried sand-gravel mixture, taken in predetermined proportions, mixed to a homogeneous mass and heated in an electric furnace to a temperature of 150-180 ° C for 60 minutes with constant stirring. The heat-treated mixture was compacted in hot metal molds of 4 × 4 × 12 cm in size and cooled at room temperature.

The resulting beams were tested for physical and mechanical properties: compressive strength according to GOST 1.81.0.5.0.-80, water absorption according to GOST 12730.3-78.

The proposed and known binder compositions and their properties are presented in tables 1 and 2. From the tables it can be seen that the proposed compositions 1, 2, 3, 4 in terms of characteristics (water absorption, compressive strength) are significantly better than the binder according to A.S. No. 1669895.

Table 1 No. Compositions, wt.% composition Sulfur Liquid Sand Kek- Granite waste glass gravel sulfur sulfide. oilman. material Waste pr- crushed stone or complex wa phosphoric calrolactam slag 1 29th 1 70 2 31.5 1,5 67 3 34.7 2,3 63 4 37 3 60 Prototype 20-30 70-80 table 2 Composition No. Properties Density ρ, g / cm ² Compressive strength, MPa Water absorption,% 1 2,3 83 1,5 2 2.2 84 1.4 3 2.1 89 1.3 4 2.2 85 1.4 Prototype 1.9-2.2 75-82 2.9-3.2 * * The value of water absorption of the samples according to the prototype was measured by the authors

As the analysis of tabular data shows, samples of the proposed compositions have a lower value of water absorption (by 49%) and higher values of compressive strength (by 9%).

Claims (1)

A raw material mixture for the manufacture of building products and structures containing sulfur, a sulfur modifier and aggregate, characterized in that it contains sulfur waste from the Nizhnekamsk oil refinery RT as sulfur, liquid glass as a sulfur modifier, and a sand and gravel mixture consisting of sulfur from 75% sand-screenings and 25% gravel, with the following ratio of components, wt.%: Sulfur Waste 29-37 Liquid glass 1-3 Sand and gravel 60-70