T/MZIS 006-2021 Mechanically produced sand for permeable mortar

Scope

Main technical contents: 1.1 Strength 1.1.1 The test shall be conducted using a sulfate solution method, and the mass loss should not exceed 8%. 1.1.2 Mechanical aggregates, in addition to meeting the requirements of 4.4.1, should have a maximum crushing index of no more than 20% for a single grade. 1.2 Apparent density The apparent density should not be less than 2500 kg/m3. 1.3 Loose bulk density and compact bulk density The loose bulk density and compact bulk density should not be less than 1400 kg/m3. 1.4 Porosity The porosity should not exceed 44%. 1.5 Surface dry water absorption rate The surface dry water absorption rate should not exceed 2.0%. 1.6 Alkali aggregate reaction After the alkali aggregate reaction test, the specimens should not exhibit cracks, cracking, or colloidal overflow, and the expansion rate at the specified test age should be less than 0.10%. 4.10 Both the internal and external radiation exposure indices should be ≤1.0.

Development Information

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