Polymer-concrete mixture

FIELD: chemistry.

SUBSTANCE: invention relates to polymer-based construction materials used in making chemical-resistant, high-strength articles and structures. The polymer-concrete mixture contains the following in wt %: low molecular weight polybutadiene 8-11; sulphur 4.0-5.5; thiuram 0.15-0.35; captax 0.04-0.12; diphenylguanidine 0.04-0.12; zinc oxide 1.0-2.4; calcium oxide 0.45-0.60; thermal power plant flue ash 8-10; quartz sand 22-25; crushed granite stone 44.91-56.32.

EFFECT: invention enables to obtain a composite with high heat resistance with shorter polymer-concrete vulcanisation time.

3 tbl, 1 ex

 

The invention relates to polymeric construction materials used in the manufacture of chemically resistant products and designs, and in particular to compositions containing as a binder diene oligomers.

Known polymer mixture /1/, which includes the following components, wt%:

Low molecular weight CIS-alimodian8,00-11,00
Sulfur3,00-6,50
Thiuram0,30-0,70
Zinc oxide1,50-5,00
Calcium oxide0,30-0,60
Ash CHP7,00-10,00
Quartz sandof 24.90-27,10
Granite crushed stoneRest

However, the aforesaid mixture is characterized by a high enough heat resistance.

The most similar set of features of the present invention are polymer mixture /2/that includes the following components, wt%:

Low-molecular-weight floor is butadiene 8,00-12,00
Sulfur3,00-5,00
Thiuram0,4-0,6
Captax0,1-0,2
Alltex0,15-0,25
Zinc oxide2,0-3,0
Calcium oxide0,30-0,70
Ash CHP6,00-10,00
Quartz sand21,0-28,0
Granite crushed stoneRest

However, this mixture is also characterized by insufficient heat resistance.

Object of the present invention is to improve the heat resistance of polymer concrete mixtures, reducing the time of vulcanization of the mixture.

This object is achieved in that the polymer mixture comprising a low molecular weight polybutadiene, sulfur, thiuram, captax, calcium oxide, zinc oxide, fly ash, power plant, quartz sand, granite gravel, differs from the prototype in that it further comprises diphenylguanidine in the following ratio, wt.%:

Low molecular weight polybutadiene8,00-11,00
Sulfur4,00-5,50
Thiuram0,15-0,35
Captax0,04-0,12
Diphenylguanidine0,04-0,12
Zinc oxide1,00-2,40
Calcium oxide0,45-0,60
Ash CHP8,00-10,00
Quartz sand22,00-25,00
Granite crushed stone44,91-56,32

Introduction in a mixture of accelerator diphenylguanidine can improve the heat resistance of the resulting composite to reduce the time of vulcanization of the mixture.

System accelerator "tioram - captex - diphenylguanidine" creates a synergistic effect, that is, it increases the activity of each other. At elevated temperatures the degradation chain, as thiuram, captax, diphenylguanidine link chain and contribute additional vulcanization. This increases the resistance and reduces the time of vulcanization.

the Rymer.

The characteristics used in the polymer mixture components:

- low molecular weight polybutadiene pfbr (TU 38.103641-87) is a clear fluid with a dynamic viscosity of 1.5 PA·s, a density of 890 kg/m3;

- technical sulfur (GOST 127,4-93) - a bright yellow powder density 2070 kg/m3, melting point 114°C;

- tioram (tetramethylthiuramdisulphide, THE 6-00-00204197-253-93) gray - white powder density 1290-1400 kg/m3;

- captax (GOST 739-74 with amendment # 1). Is a yellow powder density 1800...2100 kg/m3;

- diphenylguanidine (TU 2491-001-43220031-2006 with amendment # 1). Is a powder of light yellow color density 1900...2000 kg/m3;

- calcium oxide - Cao (GOST 8677-76) - white powder density 2050-2900 kg/m3;

- it is mineral filler is fly ash Voronezh TPP with a specific surface area 2500-2700 cm2/g, having the following composition, wt.%:

SiO - 48-52

Al2O3- 18,5-21,5

Fe2O3- 12,5-14,5

CaO - 5-5,5

MgO - 2-3

K2O - 1-2

Na2O - 1

S2O3- 0,4-0,3

n.n.n. - 6-15

The composition of the fly ash, which is produced during the combustion of the Donetsk coal grades A-III, a constant in the above limits and meets the requirements of GOST 25818-83;

- Sand Wolski career that meets GOST 8736-77, and granite gravel that meets the requirements of GOST 4731-72. Physical properties of sand and gravel are shown in table 1:

The placeholderParticle size, mmDensity, g/cm3Bulk density, g/cm3Specific surface area, cm2/gVoidness, %Water absorption, %
Quartz sand0,63...1,252,651,613339,11,32
0,315...to 0.632,651,61--1,32
Granite crushed stone5...10to 2.671,5of 5.441,41,21

Preparation of the polymer mixture is Paladino in the following sequence: low molecular weight polybutadiene injected sulfur, thiuram, captax, diphenylguanidine, the oxide is Inka, calcium oxide and mix thoroughly. Then enter the filler fly ash and mixed, fine aggregate and again stirred, then added coarse aggregate and the mixture again thoroughly mixed. The mixture is placed in a specially prepared form, compacted on a vibrating plate for 150 and subjected to heat treatment at a temperature of 120°C for 8 hours

For experimental verification of the claimed mixtures were made of a beam-samples of size 30×60×700 cm five compositions (table 2).

Table 2
NameContent, wt.%
12345
Low molecular weight polybutadiene8,009,009,0010,011,00
Sulfur4,04,54,55,05,5
Thiuram0,150,200,250,300,35
Captax0,040,060,080,100,12
Diphenylguanidine0,040,060,080,100,12
Zinc oxide1,01,41,82,12,4
Calcium oxide0,450,50,50,550,60
Ash CHP8,09,09,010,010,0
Quartz sand22,023,024,025,025,0
Granite crushed stone56,3252,2850,7946,8544,91

Characteristics of the obtained composites and prototype are presented in table 3.

Table 3
PropertiesThe proposed mixtureThe placeholder
12345
Heat according to Martens121125131124119115

Sources of information

1. As the USSR №1724623 A1, CL C04B 26/04, 1992, Polymer mixture.

2. RF patent №2266876 C1, CL C04B 26/04 invention "Polymer blend" on the application number 2004124302/04, the authors Potapov SHE, Borisov, Y.M., Panfilov D.V., Mihov VA, Palyutin SUPERVISION, Perekalski PU, Speak, V.A., A.V. Voronov, A.I. boars, Dudin PHD, Piskunov S., priority 09.08.2004 published 27.12.2005.

Polymer cm is camping, including low molecular weight polybutadiene, sulfur, calcium oxide, zinc oxide, thiuram, captax, fly ash of thermal power plant, quartz sand, granite gravel, characterized in that it further comprises diphenylguanidine in the following ratio, wt.%:

low molecular weight polybutadiene8-11
sulfur4,00-5,50
thiuram0,15-0,35
captax0,04-0,12
diphenylguanidine0,04-0,12
zinc oxide1,00-2,40
calcium oxide0,45-0,60
ash CHP8-10
quartz sand22-25
granite crushed stone44,91-56,32



 

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