| 摘要 |
FIELD: construction. ^ SUBSTANCE: mastic contains the following components, wt parts: Portland cement 1.7-2.0, quartz sand 3.4-4.0; asbestos 0.6-0.8; crushed volcanic tuff 1.7-2.0. ^ EFFECT: increased strength of coats produced from mastic. ^ 1 tbl |
