Building mortars GOST 25328 82. Developed and introduced by the Ministry of Industry of Building Materials of the USSR

Approved and put into effect
Decree of the Gosstroy of the USSR
dated April 9, 1982 N 93
STATE STANDARD OF THE UNION OF THE SSR
CEMENT FOR MORTAR
TECHNICAL CONDITIONS
masonry cement. Specifications
GOST 25328-82
Group G12
OKP 57 3811
Introduction date
January 1, 1983
Designed by the Ministry of Industry building materials THE USSR.
Developers: E.B. Antin, Ph.D. tech. sciences (topic leader); E.T. Yashin; K.V. Krasnova; E.N. Vorontsov; NOT. Mikirtumova.
Introduced by the Ministry of Industry of Building Materials of the USSR.
Approved and put into effect by the Decree State Committee USSR on construction affairs dated 04/09/82 N 93.
This standard applies to cement obtained on the basis of Portland cement clinker and intended for mortars used in the production of masonry, facing and plastering works, as well as for the manufacture of non-reinforced concrete grades M150 and below, for which there are no requirements for frost resistance.
1. TECHNICAL REQUIREMENTS
1.1. Cement shall be manufactured in accordance with the requirements of this International Standard. technological regulations approved in the prescribed manner.
1.2. cement for mortars- a product obtained by joint grinding of Portland cement clinker, gypsum, active mineral additives and filler additives.
1.3. The materials used for the manufacture of cement must comply with the requirements stipulated in the standards or specifications for these materials.
1.4. Additives
1.4.1. Active mineral additives - according to normative and technical documentation.
Granular blast-furnace or electrothermophosphoric slags - according to GOST 3476.
1.4.2. Filler additives
Quartz sand with a silica content of at least 90%. The content of clay, silt and fine pulverized fractions of less than 0.05 mm should not be more than 3%.
Crystalline limestone, marble and dust from electrostatic precipitators of clinker kilns - according to normative and technical documentation.
1.5. gypsum stone- according to GOST 4013-74. It is allowed to use phosphogypsum and borogypsum according to normative and technical documentation.
1.6. The content of clinker in cement must be at least 20% by weight of cement.
1.7. It is allowed to introduce plasticizing or water-repellent additives into cement that improve the quality of cement. The amount of plasticizing additives should be no more than 0.5%, and water-repellent additives - no more than 0.3% of the mass of cement.
1.8. It is allowed to introduce air-entraining additives into cement in an amount of up to 1% of the mass of cement.
1.9. In the manufacture of cement to intensify the grinding process, it is allowed to introduce technological additives that do not impair the quality of cement, in an amount of not more than 1% of the mass of cement.
1.10. The compressive strength of cement at 28 days of age must be at least 19.6 MPa (200 kgf/cm2).
1.11. The beginning of cement setting should occur no earlier than 45 minutes, and the end - no later than 12 hours from the start of mixing.
1.12. The water separation of the cement paste made at W / C = 1.0 should not be more than 30% by volume.
1.13. Cement samples shall show uniform volume change when tested by boiling in water.
1.14. The fineness of cement grinding should be such that when sifted through a sieve N 008 according to GOST 3584-73, at least 88% of the mass of the sieved sample passes.
1.15. The content of sulfuric anhydride in cement must be at least 1.5 and not more than 3.5% of the mass of cement.
1.16. The content of alkali oxides in cement should not be more than 2% by weight of cement.
2. ACCEPTANCE RULES
2.1. Acceptance rules - according to GOST 22236-76.
3. TEST METHODS
3.1. Chemical composition cement is determined according to GOST 5382-73.
3.1.1. The content of the amount of alkali oxides is calculated by the formula.
3.2. Physical and mechanical properties cement is determined according to GOST 310.1-76 - GOST 310.3-76; GOST 310.4-81.
3.3. Content in quartz sand silicon oxide, clay, silt and fine pulverized fractions are determined according to GOST 6139-78.
3.4. The water separation of cement is determined by the following method.
3.4.1. Equipment
Porcelain glass with a capacity of 1 l.
Metal spatula.
Technical scales.
Graduated cylinder with a capacity of 500 ml.
3.4.2. Testing
350 g of cement and 350 g of water are weighed with an accuracy of 1 g. Water is poured into a porcelain glass, then a sample of cement is poured into the glass for 1 min, continuously stirring the contents with a metal spatula. The resulting cement paste is stirred for another 4 minutes and carefully poured into a graduated cylinder. The cylinder with the cement paste is placed on the table and the volume of the cement paste is immediately counted. During the experiment, the cylinder must stand still and not be subjected to shocks and shaking.
The volume of settled cement paste is noted 4 hours after the first reading.
Water separation coefficient (volume) () is calculated by the formula
,
where a is the initial volume of cement paste, cm3;
b is the volume of settled cement paste, cm3.
4. PACKAGING, LABELING, TRANSPORT AND STORAGE
4.1. Packaging, marking, transportation and storage of cement is carried out in accordance with GOST 22237-76.
5. INSTRUCTIONS FOR USE
5.1. Cement for mortars must be used in accordance with the Instructions for the preparation and use of mortars, approved by the State Construction Committee of the USSR.
Due to the delayed hardening at low temperatures, this cement should generally be used at environment not lower than +10 °С.
6. MANUFACTURER WARRANTY
6.1. The manufacturer guarantees the compliance of cement with all the requirements of this standard within a month, provided that it is transported in accordance with the requirements of GOST 22237-76.

CEMENT FOR BUILDING
SOLUTIONS

TECHNICAL CONDITIONS

GOST 25328-82

USSR STATE COMMITTEE
CONSTRUCTION

Moscow

DEVELOPED by the Ministry of Building Materials Industry of the USSR

PERFORMERS

Z. B. Entin,cand. tech. sciences (topic leader); E. T. Yashina; K. V. Krasnova; E. N. Vorontsova; N. E. Mikirtumova

INTRODUCED by the Ministry of Industry of Building Materials of the USSR

Deputy minister V. I. Kushchidi

APPROVED AND INTRODUCED BY Decree of the State Committee of the USSR for Construction of April 9, 1982 No. 93

STATE STANDARD OF THE UNION OF THE SSR

By the Decree of the State Committee of the USSR for Construction Affairs of April 9, 1982 No. 93, the deadline for the introduction was established

from 01.01. 1983

This standard applies to cement derived from Portland cement clinker and intended for mortars used in the manufacture of masonry, facing and plastering works, as well as for the manufacture of non-reinforced concrete grades M150 and below, for which there are no requirements for frost resistance.

1 . TECHNICAL REQUIREMENTS

1.1 . Cement must be produced in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner.

1.2 . Mortar cement is a product obtained by joint grinding of Portland cement clinker, gypsum, active mineral additives and filler additives.

1.3 . The materials used for the manufacture of cement must comply with the requirements stipulated in the standards or specifications for these materials.

1.4 . Additives

1.4.1 . Active mineral additives - according to normative and technical documentation.

Granulated blast-furnace or electrothermophosphoric slags - according to GOST 3476-74.

1.4.2 . Filler additives

Silica sand SiO2 at least 90%. The content of clayey, silty and fine pulverized fractions less than 0.05 mm in size should not exceed 3%.

Crystalline limestone, marble and dust from electrostatic precipitators of clinker kilns - according to normative and technical documentation.

1.5 . Gypsum stone - according to GOST 4013-74. It is allowed to use phosphogypsum and borogypsum according to normative and technical documentation.

1.6 . The content of clinker in cement must be at least 20% of the mass of cement.

1.7 . It is allowed to introduce plasticizing or water-repellent additives into cement that improve the quality of cement. The amount of plasticizing additives should be no more than 0.5%, and water-repellent additives - no more than 0.3% of the mass of cement.

1.8 . It is allowed to introduce air-entraining additives into cement in an amount of up to 1% of the mass of cement.

1.9 . In the manufacture of cement, in order to intensify the grinding process, it is allowed to introduce technological additives that do not impair the quality of cement, in an amount of not more than 1% of the mass of cement.

1.10 . The compressive strength of cement at 28 days of age must be at least 19.6 MPa (200 kgf / cm 2).

1. 1 1 . The beginning of cement setting should occur no earlier than 45 minutes, and the end - no later than 12 hours from the start of mixing.

1.12 . The water separation of the cement paste made at W / C = 1.0 should not be more than 30% by volume.

1.13 . Cement samples shall show uniform volume change when tested by boiling in water.

1 .14 . The fineness of cement grinding should be such that when sieved through a sieve No. 008 according to GOST 3584-73, at least 88% of the mass of the sieved sample passes.

1.15 . Sulfuric anhydride contentSO3 in cement should be at least 1.5 and not more than 3.5% of the mass of cement.

1.16 . The content of alkali oxides in the cement should not exceed 2% by weight of the cement.

2 . ACCEPTANCE RULES

2.1 . Acceptance rules - according to GOST 22236-76.

3 . TEST METHODS

3.1 . The chemical composition of cement is determined according to GOST 5382-73.

3.1.1 . The content of the total alkali oxides is calculated by the formulaR 2 O =Na 2 O + 0.658 K 2 O.

3.2 . The physical and mechanical properties of cement are determined byGOST 310.1-76 -GOST 310.3-76; GOST 310.4-81.

3.3 . Silica content in quartz sandSiO2 , clayey, silty and fine pulverized fractions are determined according to GOST 6139-78.

3.4 . The water separation of cement is determined by the following method.

3.4.1 . Equipment

Porcelain glass with a capacity of 1 l.

Metal spatula.

Technical scales.

Graduated cylinder with a capacity of 500 ml.

3.4.2 . Holdingtests

350 g of cement and 350 g of water are weighed with an accuracy of 1 g. Water is poured into a porcelain glass, then a sample of cement is poured into the glass for 1 min, continuously stirring the contents with a metal spatula. The resulting cement paste is stirred for another 4 minutes and carefully poured into a graduated cylinder. The cylinder with the cement paste is placed on the table and the volume of the cement paste is immediately counted. During the experiment, the cylinder must stand still and not be subjected to shocks and shaking.

The volume of settled cement paste is noted 4 hours after the first reading.

The coefficient of water separation (volumetric) is calculated by the formula

where a- the initial volume of cement paste, cm 3;

in - volume of settled cement paste, cm 3 .

4 . PACKAGING, LABELING, TRANSPORT AND STORAGE

4.1 . Packaging, marking, transportation and storage of cement is carried out in accordance with GOST 22237-76.

5 . INSTRUCTIONS FOR USE

5.1 . Cement for mortars must be used in accordance with the Instructions for the preparation and use of mortars, approved by the State Construction Committee of the USSR.

Due to the slow hardening low temperatures this cement should be used, as a rule, at an ambient temperature of at least +10 ° WITH.

6 . MANUFACTURER'S WARRANTY

6.1 . The manufacturer guarantees the compliance of cement with all the requirements of this standard within a month, provided that it is transported in accordance with the requirements of GOST 22237-76.

GOST 25328-82

UDC 691.54:006.354 Group Zh12

STATE STANDARD OF THE UNION OF THE SSR

CEMENT FOR MORTAR

Specifications

By the Decree of the State Committee of the USSR for Construction Affairs of April 9, 1982 No. 93, the deadline for the introduction was established

from 01.01. 1983

DEVELOPED

PERFORMERS

Z. B. Entin, Ph.D. tech. sciences (topic leader); E. T. Yashina; K. V. Krasnova; E. N. Vorontsova; N. E. Mikirtumova

INTRODUCED Ministry of Industry of Building Materials of the USSR

Deputy Minister V. I. Kushchidi

APPROVED AND INTRODUCED Decree of the USSR State Committee for Construction of April 9, 1982 No. 93

Non-compliance with the standard is punishable by law

This standard applies to cement obtained on the basis of Portland cement clinker and intended for mortars used in the production of masonry, facing and plastering works, as well as for the manufacture of unreinforced concrete grades M150 and below, for which frost resistance requirements are not imposed.

1. TECHNICAL REQUIREMENTS

1.1. Cement must be produced in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner.

1.2. Mortar cement is a product obtained by joint grinding of Portland cement clinker, gypsum, active mineral additives and filler additives.

1.3. The materials used for the manufacture of cement must comply with the requirements stipulated in the standards or specifications for these materials.

1.4. Additives

1.4.1. Active mineral additives - according to normative and technical documentation.

Granulated blast-furnace or electrothermophosphoric slags - according to .

1.4.2. Filler additives

Quartz sand containing silicon oxide SiO 2 not less than 90%. The content of clay, silt and fine pulverized fractions of less than 0.05 mm should not be more than 3%.

Crystalline limestone, marble and dust from electrostatic precipitators of clinker kilns - according to normative and technical documentation.

3.4. The water separation of cement is determined by the following method.

3.4.1. Equipment

Porcelain glass with a capacity of 1 l.

Metal spatula.

Technical scales.

Graduated cylinder with a capacity of 500 ml.

3.4.2. Holdingtests

The volume of settled cement paste is noted 4 hours after the first reading.

The coefficient of water separation (volumetric) is calculated by the formula

where a- the initial volume of cement paste, cm 3;

in- volume of settled cement paste, cm 3 .

4. PACKAGING, LABELING, TRANSPORT AND STORAGE

4.1. Packaging, marking, transportation and storage of cement is carried out in accordance with GOST 22237-85.

5. INSTRUCTIONS FOR USE

5.1. Cement for mortars must be used in accordance with the Instructions for the preparation and use of mortars, approved by the State Construction Committee of the USSR.

Due to the slow hardening at low temperatures, this cement should generally be used at an ambient temperature of at least +10°C.

6. MANUFACTURER WARRANTY

6.1. The manufacturer guarantees the compliance of cement with all the requirements of this standard within a month, provided that it is transported in accordance with the requirements of GOST 22237-85.

GOST 25328-82

Group G12

INTERSTATE STANDARD

CEMENT FOR MORTAR

Specifications

masonry cement. Specifications

ISS 91.100.10
OKP 57 3811

Introduction date 1983-01-01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of Industry of Building Materials of the USSR

2. APPROVED AND INTRODUCED BY Decree of the State Committee of the USSR for Construction Affairs of 09.04.82 N 93

3. INTRODUCED FOR THE FIRST TIME

4. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS


	Item number











	2.1, 4.1, 6.1

5. REPUBLICATION. December 2003

This standard applies to cement obtained on the basis of Portland cement clinker and intended for mortars used in the production of masonry, facing and plastering works, as well as for the manufacture of unreinforced concrete grades M 50 and below, for which frost resistance requirements are not imposed.

1. TECHNICAL REQUIREMENTS

1.1. Cement must be produced in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner.

1.2. Cement for the construction of mortars is a product obtained by joint grinding of Portland cement clinker, gypsum, active mineral additives and filler additives.

1.3. The materials used for the manufacture of cement must comply with the requirements stipulated in the standards or specifications for these materials.

1.4. Additives

1.4.1. Active mineral additives - according to normative and technical documentation (NTD).

Granulated blast-furnace or electrothermophosphoric slags - according to GOST 3476.

1.4.2. Filler additives

Quartz sand with a silica content of at least 90%. The content of clay, silt and fine pulverized fractions of less than 0.05 mm should not exceed 3%.

Crystalline limestone, marble and dust from electrostatic precipitators of clinker kilns - according to NTD.

1.5. Gypsum stone - according to GOST 4013. It is allowed to use phospho- and borogypsum according to NTD.

1.7. It is allowed to introduce plasticizing or water-repellent additives into cement that improve the quality of cement. The amount of plasticizing additives should be no more than 0.5%, and water-repellent additives - no more than 0.3% of the mass of cement.

1.8. It is allowed to introduce air-entraining additives into cement in an amount of up to 1% of the mass of cement.

1.9. In the manufacture of cement to intensify the grinding process, it is allowed to introduce technological additives that do not impair the quality of cement, in an amount of not more than 1% of the mass of cement.

1.10. The compressive strength of cement at 28 days of age must be at least 19.6 MPa (200 kgf/cm).

1.11. The beginning of cement setting should occur no earlier than 45 minutes, and the end - no later than 12 hours from the start of mixing.

1.12. The water separation of the cement paste made at W/C=1.0 should not be more than 30% by volume.

1.13. Cement samples shall show uniform volume change when tested by boiling in water.

1.14. The fineness of cement grinding should be such that when sifted through a sieve N 008 according to GOST 6613, at least 88% of the mass of the sieved sample passes.

1.15. The content of sulfuric anhydride in cement must be at least 1.5 and not more than 3.5% of the mass of cement.

2. ACCEPTANCE RULES

2.1. Cement acceptance rules - according to GOST 30515.

3. TEST METHODS

3.1. The chemical composition of cement is determined according to GOST 5382.

3.2. The physical and mechanical properties of cement are determined according to GOST 310.1 - GOST 310.6.

3.4. The water separation of cement is determined by the following method.

3.4.1. Equipment

Porcelain glass with a capacity of 1 l.

Metal spatula.

Technical scales.

Graduated cylinder with a capacity of 500 ml.

3.4.2. Testing

The volume of settled cement paste is noted 4 hours after the first reading.

The coefficient of water separation (volume) as a percentage is calculated by the formula

where is the initial volume of cement paste, cm;

- the volume of settled cement paste, see

4. PACKAGING, LABELING, TRANSPORT AND STORAGE

4.1. Packaging, marking, transportation and storage of cement is carried out in accordance with GOST 30515.

5. INSTRUCTIONS FOR USE

5.1. Cement must be used in accordance with the Instructions for the preparation and use of mortars approved by Gosstroy.

Due to the delayed hardening at low temperatures, this cement should generally be used at an ambient temperature of at least 10 °C.

6. MANUFACTURER WARRANTY

6.1. The manufacturer guarantees the compliance of cement with all the requirements of this standard within a month, subject to compliance with its transportation and in accordance with the requirements of GOST 30515.

Electronic text of the document
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official publication
Moscow: IPK Standards Publishing House, 2004