SU1530670A1 - Foamed mortar for consolidating slopes and method of producing same - Google Patents

Abstract

The invention relates to the construction and can be used to strengthen the slopes of the grooves and pits. The purpose of the invention is to increase the tensile strength and decrease the water permeability of the solidified mortar. Foamed mortar to strengthen slopes contains

wt.h: portland cement: 100

100-300 quartz sand

ethoxylated alkylphenol 0.1-0.3

liquid glass 0.5-1.0

sodium fluoride 2-3

styrene latex 2-5

bentonite 1.5-2.5

water 45-75. The preparation of foamed mortar to reinforce slopes is carried out as follows. First, a foamed suspension is prepared by successively mixing bentonite, liquid glass, ethoxylated alkylphenol and styrene-butadiene latex with water, keeping it for 3-5 hours with occasional stirring, after which portland cement and sodium fluoride are added with stirring. Flexural strength of a foamed mortar to strengthen the slopes 2.41-3.59 MPa, filtration coefficient 5.37 ^. 10 ^-1 ° -7,0 ^. 10 ^-11 cm / s. 3 tab.

Description

one

(21) 4366143 / 23-33

(22) 12/18/87

(46) 12/23/89. Bul Number 47

(71) All-Union Scientific Research Institute of Transport Construction

(72) G.O.Smirnova, V.G.Golubev, S.S.Korovchenko, A.V.Burnstein

and A.V. Drokov (53) 624.138.4 (088.8) (56) Korolkov Yu.N. Protection of the slopes of rocky excavations of railways and roads from weathering by the method. gunning with the use of aerated solutions. Sat scientific, works, vol. 27. M., ZNIIS, 1968, p. 68-75.

Omel Nenko N.K. and others. Strengthening the slopes of rocky excavations on BAM aerated with cement-sand solutions. - Transport construction, 1978, No. 10, p. 4-5.

(54) FOAMED CONSTRUCTION SOLUTION FOR STRENGTHENING OF SHOPS AND METHOD FOR ITS PREPARATION

(57) The invention relates to the construction and can be used to strengthen the slopes of the grooves and pits. The purpose of the invention is to increase the tensile strength and decrease the water permeability of the solidified mortar. Foamed mortar to strengthen the slopes contains, wt.h .: Portland cement 100; silica sand 100-300 j (ethoxylated alkylphenol 0.1-0.3; liquid glass 0.5-1.0; sodium fluoride 2-5; butadiene styrene latex 2-5, bentonite 1.5-2.5, water 45-75; Preparation of foamed mortar to reinforce the slopes is carried out as follows: First, the foamed suspension is prepared by successively mixing bentonite, water glass, oxyethylated alkylphenol and butadiene styrene latex with water, and keeping it for 3-5 hours with occasional mixing, after which it is introduced rtland cement, quartz sand and sodium fluoride, tensile strength in bending of foamed mortar to strengthen the slopes 2.41-3.59 Mlla, filtration coefficient - 5.37 "10 - 7, cm / s. 2 cf lly, 3 tab.

(L

: l

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about

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The invention relates to the construction and can be used to strengthen the slopes of the grooves and pits.

The aim of the invention is to increase the tensile strength and decrease the water permeability of the solidified mortar.

The method is carried out as follows.

Bentonite clay powder, water glass, foaming agent - ethoxylated alkylphenol (OP-10) and styrene-butadiene latex are fed to the mixer with water successively with vigorous stirring. The resulting foamed slurry is kept under periodic stirring for 3-5 hours, after which Portland cement, silica sand and sodium fluoride are successively introduced into it.

The mortar thus obtained contains, in this way, Portland cement, a foaming surface-active substance (011-10), an accelerating additive, represented by liquid glass and sodium fluoride, quartz sand, styrene-butadiene latex, bentonite and water.

The foaming agent OP-10 provides foaming solution with the formation in the total mass of dispersed and stable air bubbles. Bentonite gives the foamed solution a sedimentation resistance and increased water resistance to the cement stone. Latex particles coalesce in a thin layer around each non-hydrated (or slightly hydrated) grain of cement or their aggregates with the formation of a mutually permeable network of polymers in solution, provide an increase in the strength, water resistance and elasticity of the solution.

Preliminary obtaining a foamed suspension from water, bentonite, liquid glass, a frother and latex and keeping it for 3-5 hours enhances the adsorbing and stabilizing properties of the additives.

The lower limit of the suspension suspension (3 h) ensures the stability of the foamed solution. When all the components are mixed without such exposure or at a shutter speed of less than 3 hours, bentonite and cement absorb water and coagulation is detected when the latex is injected. Preliminary dispersion of bentonite and its aging in an alkaline environment of latex stabilized by OP-10 prevents its coagulation, the suspension of the suspension for more than 5 hours is not economically feasible, since it does not lead to further improvement of the properties of the solution,

Table 1 shows examples of the quantitative ratio of the components, and Table 1 2 - results of determination 10

15

20

25

thirty

35

40

45

50

izrazheniye at izgra time of holding the suspension for 4 h,

B. Table 3 is driven by the effect of the dwell time of the suspension on its own.

As follows from the table, the 2 nd foam builder has high rates of low permeability.

Claims (1)

Formula images 1 The foamed builder for reinforcing the decaying Portland cement, quartz foaming surface substance, accelerator hardness, is different because, in order to increase the stretching and reduce the water content of the hardened solution, ethylated alkylphenol is used as foam surfactant Accelerator hardening and sodium fluoride and before but styrene-butadiene brass at the following ratios, mac.h,: Portland cement Quartz sand Ethoxylated alkylphenol Liquid glass Sodium fluoride Styrene butadiene latex Bentonite Water 2, Method of preparing mortar of sloping slopes, including components, in contrast to the fact that at first they are prepared in suspension by sequential mixing of bent glass and hydroxyethyl glass with water. phenol and styrene butadiene, it is kept for a period of periodic bleeding, after which portland cement, qua the strength of the proposed solution is 5 sand and sodium fluoride. 0 five 0 five 0 five 0 five 0 bending, the holding time of the suspension is assumed to be 4 hours, B. Table 3 shows information on the effect of the dwell time of the suspension on the properties of the filter. As follows from the table, 2, the proposed foamed mortar has high strength and low permeability. Invention Formula 1, Foamed mortar to reinforce slopes, including Portland cement, quartz sand, a foaming surfactant, a hardening accelerator and water, are distinguished by the fact that, in order to increase the tensile strength and reduce the water permeability of the hardened mortar, it contains as a foaming surfactant, oxyethylated alkylphenol; and as a hardening accelerator, liquid glass and sodium fluoride, and additionally butadiene styrene latex and bentonite with the following m ratio, mae.ch ,: Portland Cement100 Quartz sand 100-300 Ethoxylated alkylphenol0,1-0,3 Liquid glass 0.5-1.0 Sodium fluoride 2-3 Styrene butadiene latex2-5 Bentonite 1.5-2.5 Water45-75 2, A method for preparing foamed mortar to reinforce slopes, including the mixing of components, distinguishing with f by first preparing the foamed suspension by successively mixing bentonite, water glass, ethoxylated alkylphenol and butadiene styrene latex with water, maintain it for 3-5 hours at periodic stirring, after which Portland cement, quartz 5 sand and sodium fluoride. Flexural strength K., Mlla, filtration coefficient K, cm-s, depending on the time of hardening of solutions per day  Table 1