SU1222656A1 - Fibre-concrete mix - Google Patents

Description

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The invention relates to compositions of concrete mixtures dispersed-reinforced with fibers and can be applied in construction for. fabrication of structures operated under conditions of significant temperature fluctuations.

The purpose of the invention is to increase the tensile and flexural strength, as well as to increase the frost resistance and water resistance of concrete.

The invention is carried out as follows.

With the mixer running, superphosphate is introduced into the mixing water and mixed. When the mixer is working, glass fiber is introduced into the resulting solution in the form of 2–5 mm long segments, and then cement and aggregate are introduced into the construction sand.

The water content in the concrete mix (by weight) in order to achieve the required acidity of the medium should not exceed the content of superphosphate more than 4 times, the optimal ratio of superphosphate: water is 1,: 3-1: 4. Glass fiber treated with water solutions of salts contained in superphosphate acquires enhanced resistance.

Examples of the proposed formulations are given in table. I.

Table 1

The content of components, wt.% In the composition

Portland cement brand 400

Fiberglass (lengths of 2-5 mm)

build54

42

Editor N. Gunko Order 1666/23

Compiled by N ,, Fedorova

Tehred M. Morgeptal Corrector 0. Lugov

Circulation 640 Subscription VNIIPI USSR State Committee

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

Branch PIP Patent, Uzhgorod, st. Project, 4

1222656

Continued table. one

The content of components, wt.% In the composition

ten

Simple 4 superphosphate Voda15

The properties of the resulting concretes are given in table. 2

table 2

 Physical and mechanical characteristics

Indicators D.PYA composition

20 stiffness concrete

mixes5, с32 36

Strength, MPa

under compression, 7 46

when stretched (split) when bending

8.6 9.1 13.4 14.8

Frost resistance, cycle 151 Mark on water tightness

156 B-6

Known compositions have compressive strength up to 43 MPa, when stretched to 7.2 MPa, bending up to 12 MPa, frost resistance up to 55 cycles, brand for water tightness B-2,

Thus, the proposed fiber-concrete mixture allows to obtain concrete with increased strength, frost resistance and water resistance.

It is rational to apply the invention in structures operating under conditions of significant temperature fluctuations and variable humidity, for example, in the fastenings of channel slopes,

Tsamb5 dams.

Claims (2)

FIBER CONCRETE MIXTURE, including cement, fiberglass, aggregate, additive, water, characterized in that, in order to increase tensile and bending strength, as well as increase frost resistance and water resistance, it contains simple superphosphate as an additive in the following ratio of components, wt .%: Cement Fiberglass Aggregate Strong superphosphate Water 25-30 2-4 42-54 4-6 Else>