Screed calculator
Cement and sand for a sand and cement floor screed, by weight and by the bucket.
Screed calculator
How it is worked out
Screed is mixed 1 : 4 cement to sand by weight. Dry materials take up about a third more than the laid screed. A 50 mm screed takes about 21 kg cement and 83 kg sand per m² (see 5.3).
By the bucket the same mix is about 1 : 3½, because cement is lighter than sand.
Sources
- Public-sector works specification for screeds and plaster (UK Contracts Finder): scratch coat at most 15 mm and must dry and shrink before the next coat, which can take several weeks; avoid rapid drying
- University of Babylon, Methods of construction and estimation, lecture 14: mortar is about 0.22 m³ per m³ of brick masonry; dry materials shrink by about a quarter when mixed; bulk density of cement 1,400 kg/m³
- NPTEL (Indian Institutes of Technology), soil mechanics worked examples: dry sand about 1,600 kg/m³
Screed calculator
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