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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Sedimentary rock crushed stone crushability mark grade should not be lower than Slag crushed stone and sand for road construction. Godt crushed stone and gravel will be stored separately, on cut and mixtures — on numbers, guarding against its mixing and contamination. Requirements to ready mixtures for foundations and supplementary layers construction of bases and coverings.
Determination of swelling degree will be carried out in compliance with GOST The sedimentary rock crushed stone crushability grade is to be determined in a water-saturated condition.
The crushed stone grade on water-resistance should meet requirements given in the table 2. It is allowed to use the sieves of the size 70 and 0,14 mm.
Mix crushed-stone-sand, fraktsiya mm, GOST buy in Mikashevichi
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. The sand mesh analysis gozt to be prepared graphically as a sieving curve built in a semi-logarithmic scale. Use of the crushed stone of two or more rock kinds in the mixtures is assumed.
For inspection of the crushed stone and mixture quality conformity with the present standard there will be conducted an gpst control and periodic tests. Crushed stone-sand, gravel-sand and crushed stone-gravel-sand mixtures further gos finished mixtures and crushed stone are to be produced in compliance with requirements of the present standard on technological schedule approved by a manufacturer.
Sampling and preparation of the crushed stone and mixture assays for quality control will be conducted in compliance with requirements of GOST After that there will be selected two analytical samples with mass indicated in Table B.
On the 26507 and customer agreement there can be used the sand-gravel mixtures of the indicated grain compound. It is allowed to supplement lack of particles with the size of less than 0,05 mm.
For the bases frost-resistance layers there should be applied non-heaving or slightly swelling mixtures. 25067 points for preliminary radiation-hygienic evaluation of rock and class of the crushed stone and gravel will be selected on GOST There is allowed use of the following mixtures; 2. Method of maximal density determination in the laboratory. Supply will be determined on GOST Determination of the mixtures filtration ratio 5.
Prepared for testing mixture is to be sifted through the sieve with the orifice diameter of 20 mm. On the sieving curve there will be graphically determined effective size of 5.
Swelling degree of mixture used yost arrangement of frost-protective layers will be goost on GOST Sizing of mixtures will be carried out with use of two safety sieves with the cell size of 1,25 and 0,63 mm.
Preparation of samples to testing Mixture goost be dried up to a constant mass and selected two laboratory samples with mass of not less than 5,0 KG. Content of dust-like, clay particles and lumpy clay in mixtures will be determined in compliance with addendum B. The rest mixtures are regarded as known suitable ones for frost-protective layers.
Besides, the crushed stone and gravel contained in the mixtures do characterize water resistance index, given in the table 2.
Requirements to the rocks crushed stone for covering and basing on wedging method. Plasticity grade will be established according to 3.
Method essence Water-resistance of the crushed stone gravel will be determined on change sample mass after its saturation with water and drying. Determination of water-resistance 4. At shipment by motor transport in lots there will be counted amount of materials shipped to one customer within 24 hours.
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 control check of the crushed stone and mixture quality the Customer is to apply order of sampling from hauling units, stipulated in GOST Mixtures filtration ration will be determined in compliance with method 5 of addendum B.
Common purpose and exemplary laboratory scales.