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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For its adoption goat 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. Requirements of this standard host in the items 3.
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. Requirements to the rocks crushed stone for covering and basing on wedging method.
The crushed stone on its grain compound, solidity, frost-resistance, content of laminar hearth and prickly form grains, dust-like and clay particles content, lumpy clay and content of the crushed grains in the gravel crushed stone, structural decay resistance of the crushed stone is to meet requirements of GOST Sedimentary rock crushed stone crushability mark grade should not be lower than 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.
The crushed stone plasticity grade should meet requirements given in the table 1. 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 grade on water-resistance should meet requirements given in the table 2. Requirements to ready mixtures for foundations and supplementary layers construction of bases and coverings. There is allowed use of the following mixtures; 2.
M1 and M2 — for basing at availability of proper technical-economical assessment; M3 — M11 for supplementary layers of bases. M4-M6 and M9-M10 for stabilization of motor road waysides 2. Belonging to the mixture compound. On the manufacturer and customer agreement there can be used the sand-gravel mixtures of the indicated grain compound. The mixture plasticity grade determined on grains, with the size of less than 0,63 mm.
Content of dust-like and clay particles with size of less than 0,05 mm. At that content of lumpy clay from percentage total mass of the dust-like and clay particles in the finished mixtures should not exceed: It is allowed to supplement lack of particles with the size of less than 0,05 mm. Mixture filtration coefficient ratio for supplementary layers should be not less than: For the bases frost-resistance layers there should be applied non-heaving or slightly swelling mixtures.
Swelling degree is characterized by relative deformation of the mixture frost swelling, which should make up not less than 0, 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.
It is allowed to use in the crushed stone mixtures two or more kinds of rocks. Besides, the crushed stone and gravel contained in the mixtures do characterize water resistance index, given in the table 2. 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: A manufacturer will determine and inform a customer of the crushed stone, gravel and finished mixtures bulk density.
Use of the crushed stone of two or more rock kinds in the mixtures is assumed. The crushed stone and gravel are to be accepted and delivered in lots. 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.
At shipment by motor transport in lots there will be counted amount of materials shipped to one customer within 24 hours.
For inspection of the crushed stone and mixture quality conformity with the present standard there will be conducted an acceptance control and periodic tests. At acceptance control of the crushed stone and mixtures there will be established: 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 goxt the mined rock areas directly in quarries or finished products warehouse, in compliance with GOST Sampling and preparation of the crushed stone and mixture assays for quality control will be conducted in compliance with requirements of GOST Test gist for preliminary radiation-hygienic evaluation of rock and class of the crushed stone and gravel will be selected on GOST At control check of the crushed stone and mixture quality the Customer is to apply order of sampling from hauling units, stipulated in GOST Quantity of the supplied crushed stone or mixtures will be determined on amount or mass, in compliance with requirements of GOST 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: The crushed stone used as a self-contained material, as well as the crushed stone and gravel contained in mixtures are to be tested on GOST The sedimentary rock gots stone crushability grade is to be determined in a water-saturated condition.
Mixture grain compound will be determined on GOST by sizing of dried up to fixed 5. It is allowed to use the sieves of the size 70 and 0,14 mm. Content of dust-like, clay ggost and lumpy clay in mixtures will be determined in compliance with addendum B.
The crushed stone structural resistance against silicate and ferrous decay 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.
Swelling degree of mixture used for arrangement of frost-protective layers will be determined on GOST The rest mixtures are regarded as known suitable ones for frost-protective layers.
Prepared for testing mixture is to be sifted through the sieve with the orifice diameter of 20 mm. The samples will be placed into split forms and densified by layer tamping method up to maximal density at optimum moisture content, in compliance with GOST Determination of swelling degree will be carried out in compliance with GOST Mixtures filtration ration will be determined in compliance with method 5 of addendum B.
Specific effective activity of natural radionuclides in the crushed stone and mixtures will be determined by gamma-spectrometric method on GOST Supply will be determined on GOST The crushed stone and gravel 25067 be stored separately, on cut and mixtures — on numbers, guarding against its mixing and contamination. At transportation by railroad transport there are to be fulfilled requirements of the loads lading and fastening Specifications approved by Communications Ministry.
At transportation of mixtures to a construction site an intermediate material handling is not allowed. At shipment and storage of the crushed stone and mixtures in winter period a manufacturer has to undertake measures on their freezing shoveling, treatment by special solutions and etc.
Slag crushed stone and sand for road construction. Methods of laboratory determination of physical properties. Wire woven grids with square cells. Solid rock crushed stone and gravel for construction works. Crushed stone of natural stone, gravel and crushed stone of gravel for construction works. Sand for construction works. Method of maximal density determination in the 255607. Common purpose and exemplary laboratory scales.
Method of filtration ratio laboratory determination. Heavy and fine concrete. Method of laboratory determination of swelling degree. Construction materials and items. Determination of specific effective activity of natural radionuclides.
Method of determination of dust-like and clay particles in mixtures. Method essence Content of dust-like and clay particles particles with size of less than 0,05 mm. gozt
At that determinations of contained in the mixtures crushed stone and sand will be carried out separately. 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.
Plasticity rate determination Rate of plasticity will be determined as humidity indexes. Sizing of mixtures will be carried out with use of two safety sieves with the cell size of 1,25 and 0,63 mm.
Plasticity grade will be established according to 3. Determination of water-resistance 4. Method essence Water-resistance of the crushed stone gravel will be determined on change sample mass after its saturation with water and drying.
Drying oven on TU Vessel for material saturation with water. Preparation for testing The crushed stone gravel will be washed and dried up to a constant mass, sifted through the sieve with the cell size of 5mm. After that there will be selected two analytical samples with mass indicated in Table B.
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. 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.
Water-resistance grade will be established in compliance with 3. Determination of the mixtures filtration ratio 5. The sieves on GOST and a sieve with round orifices of 5mm.
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.
Then, mixture will be sifted though the sieve with the orifices of 5 mm. It is allowed not to determine the filtration ratio for sand containing grains with the size of less than 0,16 0,14 mm. The sand mesh analysis is to be prepared graphically as a sieving curve built in a semi-logarithmic scale. On the sieving curve there will be graphically determined effective size of 5. Kondrusev on July, 10 ,