SU1293146A1 - Mortar - Google Patents

Abstract

The invention relates to compositions of mortars for plastering and waterproofing works, to protect concrete cooling towers, spray pools, wastewater treatment plants, pumping stations, as well as underground and surface structures. The invention is aimed at improving the adhesive strength of the solution to the concrete surface. Construction materials include, wt%: Portland cement 24.4-24.6; mineral microfiller 10.4-10.6; quartz sand 52.2-52.9; chloropreate latex 1.2-2.4; purified ligosulphonate, 2; water 10.4-10.6. 1 tab. sl 1chE with so 4 05

Description

The invention relates to compositions of mortars for plastering and waterproofing.

The purpose of the invention is to increase the adhesion strength of the solution to the concrete surface.

 As a microfiller, inert mineral powders with a Kudeln surface of 1500–3500, namely dolomite flour, andesitic flour, diabase flour, etc., are used. It is also possible to use fine construction sand with Mk 1.

Chloroprene latex mark MX-30 is used as a latex. Enter t jjaTBKC calculated on the dry matter.

The plasticizer, which is the stabilizer of latex NIL-20 (TU-400-802- 4-80), is a 10% aqueous solution of lignosulfonates, purified by adsorption of harmful components on a portland cement suspension.

The preparation of the RLT-20 is carried out as follows.

In the mixer pour 100 l of an aqueous solution of sulphite-yeast stillage (SDB) with a density of 1.04 g / cm, which corresponds to a 10% concentration of the solution. Then, 100 kg of Portland cement M400, 500 are poured and mixed. After 2 hours of continuous mixing, the mixture is settled for 12 hours. The solution obtained with a density of 1.055-1.07 g / cm 15% concentration, consisting of a mixture of purified lignosulfonates, is added to polymer cement solution in the amount of 0.4-0.8% by weight of cement on dry matter together with the mixing water.,

The preparation of the mortar is carried out on a concrete or mortar unit by loading the initial components of the solution in a specific sequence in order to avoid latex coagulation. At the beginning, 2/3 of the water needed to mix the mixture is poured into the mixer; Then the additive NIL-20 in the form of a solution of 15% concentration is mixed with water, after which the latex is added and the whole is mixed thoroughly for 3 minutes. Then the mineral components of the mixture are loaded into the mixer: microfiller, portland cement, sand, and the remaining water is added to the moisture content of the initial mineral components. General mixing process

takes 7-10 min. By unloading in concrete) and brought to the me works.

Prepared following Portland M-400 Dolomite flour

Sand fine Mk 2 Latex MX-30 NIL-20 Water

Their physicomechanical properties are determined in comparison with the prototype and control composition.

The composition of the prototype:

May h

wt.%

f

Portland cement M400, 500

Fine sand Latex MX-30 Stabilizer BP-7

5 Water (W / C 0.4-0.32)

29-30 58-60

1.4-3.0

0.05-0.10 0.004-0.008 0.1-0.2

0

0.4-0.32 9.8-11.5 Control Composition: Live

cement M400, 500 0.7 24 dolomite flour 0.3 10 Sand fine Mk2 1.5 52 Water, (In / В ж.ОО, 4) 0.4 14 Properties of control compositions,

compositions for the prototype and proposed

presented in the table.

formula of invention

f

Mortar for waterproofing coatings and gluing facing tiles, including Portland cement, mineral microfiller, quartz sand, chloroprene latex and water, characterized in that, 45 in order to reduce the adhesive strength of the solution to the concrete surface, it also contains a plasticizer - cleaned lignosulfonate NIL-20 in the following ratio of components to 5Q components, wt%:

Portland cement 24.4-24.6 Mineral 10.4-10.6 microfiller Quartz sand 52.2-52.9 Chloroprene

latex1,2-2,4

Purified lignosulfonate NIL-20 0.1-0.2 Voda10,4-10,6

55

; Mobility on the sediment cone, cm

Tensile strength

under compression, MPa

Tensile strength

bending, MPa

Tensile strength

when stretched

MPa

Estimated flexural strain modulus, MPa

The estimated coefficient of fracture toughness during bending (not less than 2.5-10-h)

3.0-10 7-103

3.220 2.8-103 2.510

2,810-s 0.5-10-33.0.10-3 3.2 Yu Z 3.5-10-z

7, 08

0,850,7

1.50.3

3 0.5

Editor M. Dylyn

Compiled by S.Voronin

Tehred I.Popovich Proofreader m.Sharoshi

Order 341/24 Circulation 588 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

101215

353025

7.588.5

2,02,22,5

3.220 2.8-103 2.510

5.5

0.95 0.9 0.85

2.8 3.0 3.2

Claims (1)

Claim Mortar for waterproofing coatings and gluing of facing slabs, including Portland cement, mineral microfiller, quartz sand, chloroprene latex and water, characterized in; that, in order to increase the adhesive strength of the solution to the concrete surface, it additionally contains a plasticizer - purified NIL-20 lignosulfonate in the following I ponents, wt.%: Portland cement Mineral micro-filler Quartz sand Chloroprene latex Purified lignosulfonate NIL-20 Water ratio com • 24.4-24.6 10.4-10.6 52.2-52.9 Physico-mechanical properties (28 days water regime) Compositions Prototype Control Proposed - 1 ig Mobility by cone draft, cm 7 1 1 10 12 fifteen The limit of compressive strength, MPa 25 40 35 thirty 25 Bending Strength, MPa 6.0 5,0 7.5 8 8.5 Tensile Strength, MPa 1,5 1,0 2.0 2.2 2.5. The calculated bending deformation modulus, MPa 3.0 -10 ’ 7-10 ³ 3,2'20 ³ 2.8 -10 ³ 2.5-10 * Estimated coefficient of crack resistance during bending (not less than 2.510 ' ³ ) 2,8 10 ' ³ 0.5-U ' ³ 3.0 10- ³ 3.2 10 ³ 3,5-10- ³ Water absorption by weight,% (not more than 8%) 7.0 8 5 5.5 7 Water resistance coefficient (not less than 0.7) 0.85 0.7 0.95 0.9 0.85 Adhesion to concrete with shear, .MPa 1,5 oh s 2,8 3.0 3.2 The pot life of the mixture, h (at least 1 h) 3 0.5 3 4 5 Compiled by G. Voronin Editor M. Dylyn Tehred I.Popovich Corrector m.Sharoshi Order 341/24 Circulation 588 Subscription VNIIIPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya nab., 4/5. Production and printing company, Uzhgorod, st. Project, 4