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Gost 1. GOST Rock products used for crushed stone and gravel road bases and surfacing. Specifications ГОСТ Crushed stone, gravel, and sand mixes for road and airfield surfaces and beds. Specifications Смеси щебеночно-гравийно-песчаные для покрытий и. GOST 94, Russian GOST Standards In English.

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The crushed stone and gravel are to be accepted and delivered in lots. Method of determination of a lumpy clay content in mixtures Content of lumpy clay will be determined by particle analytical sample selection, differing on viscosity.

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At shipment by motor transport in lots there will be counted amount of materials shipped to one customer within 24 hours. At shipment to a customer each batch of the crushed stone and mixtures will be accompanied by documents on quality, in which there will be specified: Content of dust-like and clay particles with size of less than 0,05 mm.

Method essence Content of dust-like and clay particles particles with size of less than 0,05 mm. Then, mixture will be sifted though the sieve with the orifices of 5 mm. Content of dust-like, clay particles and lumpy clay in mixtures will be determined in compliance with addendum B. Method of filtration ratio laboratory determination.

Drying oven on TU Table 1 Plasticity grade Pl1 Pl 2 Pl 3 Plasticity index Up to1 inclusively More than 1 to 5 More than 5 to 7 The crushed stone of higher crushability grade than ones indicated in 3. The crushed stone plasticity grade should meet requirements given in the table 1.

At that determinations of contained in the mixtures crushed stone and sand will be carried out separately. Mixture grain compound will be determined on GOST by sizing of dried up to fixed 5. Swelling degree is characterized by relative deformation of the mixture frost swelling, which should make up not less than 0, Fost to the rocks crushed stone for covering and basing on wedging method.

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Requested with this document

Lot is goost amount of the crushed stone of one cut or cut mixtures or mixtures, stipulated in the supply agreement and at one time shipped to one of the customers by railroad car or vessel.

Test points for preliminary radiation-hygienic evaluation of rock and class of the crushed stone and gravel will be selected on GOST Quantity of the supplied crushed stone or mixtures will be determined on amount or mass, in compliance with requirements of GOST At transportation of mixtures to a construction site an intermediate material handling is not allowed.

The crushed stone grade on water-resistance should meet requirements given in the table 2. Vessel for material saturation with water. Kondrusev on July, 10 The sand mesh analysis is to be prepared graphically as a sieving curve built in a semi-logarithmic scale.

The sedimentary rock crushed 25670 crushability grade is to be determined in a water-saturated condition. Slag crushed stone and sand for road construction. Plasticity rate determination Rate of plasticity will be determined as humidity indexes.

Use of the crushed stone of two or more rock kinds in the mixtures is assumed. M1 and M2 — for basing at availability of proper technical-economical assessment; M3 — M11 for supplementary layers of bases.

Preparation of samples to testing Mixture will be dried up to a constant mass and selected two laboratory samples with mass of not less than 5,0 KG.

The crushed stone and gravel will be stored separately, on cut and mixtures — on numbers, guarding against its mixing and contamination. Mixtures filtration ration will be determined in compliance with method 5 of addendum B.

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Heavy and fine concrete. Determination of specific effective activity of natural radionuclides. The crushed stone and gravel contained in the mixtures, on the solidity, frost-resistance and decay stability of the crushed stone structure should meet requirements of GOST and 3. Methods of laboratory determination of physical properties. Requirements of this standard given in the items 3. After that there will be selected two analytical samples with mass indicated in Table B.

Specific effective activity of natural radionuclides in the crushed stone and mixtures will be determined by gamma-spectrometric method on GOST For the bases frost-resistance layers there should be applied non-heaving or slightly swelling mixtures. There is allowed use of the following mixtures; 2. Prepared for testing mixture is to be sifted through the sieve with the orifice diameter of 20 mm. Samples will be soaked in water within 48 hours, after which the grains will be washed on the sieve with the cell size of 5 mm.

At transportation by railroad transport there are to be fulfilled requirements of the loads lading and fastening Specifications approved by Communications Ministry.

At acceptance control of the crushed stone and mixtures there will be established: Besides, the crushed stone and gravel contained in the mixtures do characterize water resistance index, given in the table 2. This standard is also applied to aggregates for heavy and fine concrete, fillers for asphalt mixtures, to finished mixtures for bases and coverings treated with non-organic and organic binding materials.

At that content of lumpy clay from percentage total mass of the dust-like and clay particles in the finished mixtures should not exceed: