RU2519008C1 - Jointing mix - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: jointing mix containing portland cement, slaked lime, limestone, cellulose ether, starch ether and plasticiser, additionally contains red mud washed from alkali and dried, and the plasticiser is vinyl acetate copolymer with vinyl versatate at the following ratio of components, wt %: portland cement 30-33, slaked lime 1.5-2.0, limestone 60-65, cellulose ether 0.15-0.20, starch ether 0.01-0.02, copolymer of vinyl acetate with vinyl versatate 1.0-1.5, red mud 0.3-5.0.

EFFECT: no efflorescence in process of joint hardening between construction ceramic parts and in process of operation.

1 tbl

Description

The invention relates to the production of building materials, namely to dry building mixes intended for grouting between building ceramic parts: tiles, bricks, stone and concrete blocks, etc.

Traditional jointing mixtures contain Portland cement based binder, fillers, which are usually used limestone and / or quartz sand, as well as various modifying additives and pigments (E.I. Lysenko, L.V. Kotlyarova, G.A. Tkachenko, I .V. Grishchenko, AN Yundin. Modern finishing and facing materials. Educational reference book under the general editorship of Professor A.N. Yundin // Rostov n / D, “Phoenix”, 2003, p.189, tab. 4.25).

However, the choice of suitable pigments is very limited due to the possible negative impact on the technical performance of the mixtures.

Closest to the claimed mixture is a dry mortar containing, in particular, Portland cement, slaked lime, limestone, cellulose ether, starch ether and plasticizer (RU patent No. 2262493, C04B 28/04, C04B 111: 34, publ. 20.10.2005 g.).

The basis of the invention is the task of creating a jointing mixture with high construction and technical properties and a wide palette of colors from light pink to dark brown with the involvement of waste from the production of alumina - dried and washed from alkali red sludge, acting as a pigment.

The technical result achieved by the implementation of the claimed technical solution is the lack of vysolobrazovaniya obtained in the resulting mortar mixture in the process of curing joints between building ceramic parts, during operation.

The achievement of the above technical result is ensured by the fact that the jointing mixture containing Portland cement, slaked lime, limestone, cellulose ether, starch ether and a plasticizer additionally contains alkali washed and dried red sludge, and a copolymer of vinyl acetate with vinyl versatate is used as a plasticizer in the following ratio of components , wt.%: Portland cement - 30-33, slaked lime - 1.5-2.0, limestone - 60-65, cellulose ether - 0.15-0.20, starch ether - 0.01-0.02, a copolymer of vinyl acetate with vinyl versatate - 1.0-1.5, red mud - 0.3-5.0.

The conducted experimental studies using a copolymer of vinyl acetate with vinyl versatate as a plasticizer made it possible to determine the optimal composition of the jointing mixture with high ductility. When added to the mixture washed from alkali and dried red mud in an amount of 0.3% wt. trowel joints of light pink color are obtained, at 5.0% wt. - dark brown. The increase in the content of red mud more than 5% wt. does not make sense, since the color of the seams does not change anymore.

The test results of the jointing mixture for the two extreme values of the content of red mud are shown in the table. It is clearly seen that the addition of red mud increases the basic consumer properties of the mixtures and the resulting seams. A slight decrease in mobility does not significantly affect the quality of the product. It should also be noted the absence of efflorescence during the hardening of the joints.

Table No.
at
measures The starting components,% wt. Portland cement without additives (PC 500-D0 Gachet
naya of
news Sopoli
measures vinyl acetate with vinyl versatate Methyl
hydro
sipro
pilcel
lulose Hydroxypropy
fishing starch Known
ground nyak (d _max =
0.1 mm) Red mud, dried and washed from alkalis one 30.00 1,5 1,0 0.15 0.02 65.00 2,33 2 31.79 2.0 1,0 0.20 0.01 60.00 5.00 3 33.00 2.0 1,5 0.20 0.02 62.98 0.30 four 29.00 1,5 1,0 0.15 0.01 68.09 0.25 5 34.00 2.0 1,5 0.20 0.02 56.78 5.50 No. example The properties Water consumption
% Under
vig
height
thief
mix mm The time of use of the finished mixture, min Compressive strength after 28 days, MPa Crack resistance Other
grip
base
low, MPa Visual assessment of color one 35.0 78 120 12.0 Lack of
crack 0.25 dark pink without efflorescence 2 30,0 80 120 9,4 Lack of
crack 0.50 dark brown without efflorescence 3 37.0 75 140 12,4 Lack of
crack 0.35 light pink without efflorescence four 39.0 70 110 8.7 Lack of
crack 0.15 light beige 5 28.0 75 80 9.0 Cracks 0.20 dark brown Proto
type of 32,0 83 60 9.2 Lack of
crack 0.20 Gray

Claims (1)

A mortar mixture containing Portland cement, slaked lime, limestone, cellulose ether, starch ether and a plasticizer, characterized in that it further comprises alkali washed and dried red mud, and a vinyl acetate-vinyl versatate copolymer is used as a plasticizer in the following ratio, wt% .:
Portland cement 30-33 slaked lime 1.5-2.0 limestone 60-65 cellulose ether 0.15-0.20 starch ether 0.01-0.02 vinyl acetate copolymer with vinyl versatate 1.0-1.5 red mud 0.3-5.0