The specification for an air-entrained concrete mix is givenbelow.
Crushed
Saturated Surface Dry
Maximum Size 10 mm
80% of Fine Aggregate Passing 600 μm Sieve
Using the Building Research Establishment mix design dataprovided, calculate the batch weights for a 1 m3 trial mix.
The Specification For An Air Entrained Concrete Mix Is Given Below Crushed Saturated Surface Dry Maximum Size 10 Mm 80 1 (338.43 KiB) Viewed 30 times
Concrete mix design form for air-entrained concrete Reference or calculation Stage Item 1 2 3 4 5 1.1 Characteristic strength 1.2 Standard deviation 1.3 Margin 1.5 Cement strength class 1.6 Aggregate type: coarse Aggregate type: fhe 1.7 Free water/cement ratio 1.8 Maximum free water/ cement ratio 21 Slump or Vebe time 22 Maximum aggregate size 23 Free water content 1.4 Target mean strength *1.4.1 Air content *1.4.2 Mbdified target mean strength 3.1 Cement content 3.2 Maximum cement content 3.3 Mnimum cement content 4.1 Relative density of aggregate (SSD) 4.2 Concrete density 4.3 Total aggregate content 5.1 Grading of fine aggregate 5.2 Proportion of fine aggregate 5.3 Fine aggregate content 5.4 Coarse aggregate content Specified Quantities Fig 3 C1 or per m³ (to nearest 5kg) per trial mix of Specified C2 & Para & 1 Specified 3.4 Modified free water/cement ratio Table 2, Fig 4 Specified Specified Specified Table 3 & Para 8.2" C3 Specified Specified Fig 5 & Para 83 C4 C5 Values Cement (kg) Proportion defective k Slump 42 5/52 5 Crushed/uncrushed Crushed/uncrushed use 3.1 ifs 3.2 use 3.3if> 3.1 Percentage passing 600 μm sieve Fig 6 Job title..... ) Water (kg or litres) % + - (10 x (10055 x kg/m³ kg/m³ Fine aggregate (kg) N/mm² at N/mm2 or no data X. ************+ mm or Vebe time Use the lower value known/assumed )............ N/mm² ) = = days ............ N/mm² N/mm2 N/mm² .... N/mm2 Coarse aggregate (kg) 10mm 20mm % 5 mm kg/m³ 3 kg/m³ kg/m³ kg/m³ kg/m³ 40mm *Modifications for air entrainment. Items in italics are optional limiting values that may be specified (see Section 7) Concrete strength is expressed in the units N/mm². 1 N/mm²-1 MN/m²-1 MPa. (N-newton; Pa-pascal.) The internationally known term 'relative density' used here is synonymous with specific gravity' and is the ratio of the mass of a given volume of substance to the mass of an equal volume of water. SSD-based on the saturated surface dry condition. kg/m³ kg/m³ % %
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