T/HNCS 001-2020 Composite mortar material

Scope

Scope: This standard specifies the definition, terminology, designation, strength grade and marking, material and requirements, technical requirements, test methods, inspection rules, packaging, marking, storage, and transportation of composite mortar materials. This standard applies to the preparation of various types and different strength grades of masonry, plastering, and decorative mortars in construction projects; Main technical content: 6. Technical requirements 6.1 Performance indicators of composite mortar 6.1.1 Strength grade of composite mortar The strength of composite mortar shall comply with the provisions of Table 1. Table 1 Strength of composite mortar at various ages (Unit of indicator: MPa) MC strength grade Compressive strength Compressive strength Compressive strength Flexural strength Flexural strength Flexural strength 3d 7d 28d 3d 7d 28d 15 вАФвАФ вЙ•7.0 вЙ•15 вАФвАФ вЙ•1.5 вЙ•3.0 25 вАФвАФ вЙ•10.0 вЙ•25 вАФвАФ вЙ•2.0 вЙ•4.5 32.5 вЙ•12.0 вАФвАФ вЙ•37.5 вЙ•3.0 вАФвАФ вЙ•6.0 6.1.2 Fineness The sieve residue of the composite mortar measured with an 0.08mm square sieve shall not exceed 8%. 6.1.3 Setting time The setting time of the composite mortar paste shall be not less than 60 minutes, and the final setting time shall be not later than 10 hours. 6.1.4 Stability The boiling test for stability shall be qualified. For composite mortar made of steel slag with a magnesium oxide content of more than 13%, the pressure-steam stability test shall be qualified. 6.1.5 Sulfur trioxide content The sulfur trioxide content in the composite mortar shall not exceed 4.0%. 6.1.6 Chloride ion content (Cl-) (selective indicator) The chloride ion content (mass fraction) in the composite mortar shall not exceed 0.06%. 6.1.7 Alkali content (selective indicator) The alkali content in the composite mortar shall comply with the provisions of GB175 and GB/T3183. 6.1

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