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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Plasticity rate determination Rate of plasticity will be determined as humidity indexes. Content of dust-like, clay particles and lumpy clay in mixtures will be determined in compliance with addendum B.
Mixtures filtration ration will be determined in compliance with method 5 of addendum B. At shipment by motor transport in lots there will be counted amount of materials shipped to one customer within 24 hours. Heavy and fine concrete. The crushed stone structural resistance against silicate and ferrous decay will be determined on GOST Determination of water-resistance 4. Method of maximal density determination in the laboratory.
Specific effective activity of natural radionuclides in the crushed stone and mixtures will be determined by gamma-spectrometric method on GOST At acceptance control of the crushed stone and mixtures there will be established: Supply will be determined on GOST Rate of the crushed stone and mixtures plasticity, as well as crushed stone and gravel water-resistance will be determined in compliance methods 3 and 4 of the addendum B.
Belonging to the mixture compound. Content of dust-like and clay particles with size of less than 0,05 mm. Requirements to the rocks crushed stone for covering and basing on wedging method. At that determinations of contained in the mixtures crushed stone and sand will be carried out separately.
Crushed stone-sand, gravel-sand and crushed stone-gravel-sand mixtures further — finished mixtures and crushed stone are to be produced in compliance with requirements of the present standard on technological schedule approved by a manufacturer.
Sand for construction works. It is allowed to supplement lack of particles with the size of less than 0,05 mm. Determination of the mixtures filtration ratio 5.
Sizing of mixtures will be carried out with use of two safety sieves with the cell size of 1,25 and 0,63 mm. Kondrusev on July, 10 Solid rock crushed stone and gravel for construction works. Then, mixture will be sifted though the sieve with the orifices of 5 mm.
Slag crushed stone and sand for road construction. It is allowed to use the sieves of the size 70 and 0,14 mm. For inspection of the crushed stone and mixture quality conformity with the present standard there will be conducted an 25067 control and periodic tests.
Wire woven grids with square cells.
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Prepared for testing mixture is to be sifted through the sieve with the orifice diameter of 20 mm. Swelling degree of mixture used for arrangement of frost-protective layers will be determined on 256007 Preparation for testing The crushed 26507 gravel will be washed and dried up to a constant mass, sifted through the sieve with the cell size of 5mm.
There is allowed use of the following mixtures; 2. The crushed stone plasticity grade should meet requirements given in the table 1.
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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. Determination of specific effective activity of natural radionuclides. The rest mixtures are regarded as known suitable ones for frost-protective layers. 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.
Besides, the igneous and metamorphic rock crushed stone grade on crushability is equal to and lower, the sedimentary rock crushed stones grade does make up and lower, the gravel crushed stone grade is equal to and lower values do characterize the plasticity and water resistance indexes.
In the absence of geological exploration data on radiation-hygienic evaluation of the field and report on the crushed stone and mixtures report, the manufacturer will previously evaluate the mined rock areas directly in quarries or finished products warehouse, in compliance with GOST Method of determination of dust-like and clay particles in mixtures.
Vessel for material saturation with water. Quantity of the supplied crushed stone or mixtures will be determined on amount or mass, in compliance with requirements of GOST Drying oven on TU 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.
M1 and M2 — for basing at availability of proper technical-economical assessment; M3 — M11 for supplementary layers of bases.
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The crushed stone, gravel and mixtures are divided into classes depending on total specific effective activity value of natural radionuclides Aeff are subdivided and applied: Methods of laboratory determination of physical properties. Lot is an 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.
Mixture grain compound will be determined on GOST by sizing of dried up to fixed 5. Test operation Each sample will be placed into a vessel with water of a room temperature so, as the water level in a vessel would be higher of the grain surface, which is not below of 2 cm.
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.
For the bases frost-resistance layers there should be applied non-heaving or slightly swelling mixtures. At that content of lumpy clay from percentage total mass of the dust-like and clay particles in the finished mixtures should not exceed: Requirements to ready vost for foundations and supplementary layers construction of bases and coverings.
The sedimentary rock crushed stone crushability grade is to be determined in a water-saturated condition.