对某II型聚合物水泥防水涂料进行拉伸性能检测,5个试件测得的宽度、厚度、断裂时最大荷载、断裂时标距如下表,计算此防水涂料的拉伸强度和断裂伸长率,并对其进行判定。soO检测VBA
试件编号 |
宽度soO检测VBA (mm) |
厚度平均值soO检测VBA (mm) |
断裂时最大荷载(N) |
断裂时标距soO检测VBA (mm) |
1 |
6.0 |
1.40 |
19.4 |
53.1 |
2 |
6.0 |
1.42 |
18.0 |
55.0 |
3 |
6.0 |
1.41 |
19.2 |
61.2 |
4 |
6.0 |
1.42 |
18.4 |
60.0 |
5 |
6.0 |
1.41 |
19.0 |
54.0 |
答:19.4/(6.0×1.40)=2.31 MPa,18.0/(1.42×6.0)=2.11MPa,19.2/(1.41×6.0)=2.27MPa;18.4/(1.42×6.0)=2.16MPa;19.0/(1.41×6.0)=2.25MPasoO检测VBA
拉伸强度=(2.31+2.11+2.27+2.16+2.25)/5=2.22MPa≥1.8MPa,合格;soO检测VBA
(53.1-25)/25=112%;(55.0-25)/25=120%;(61.2-25)/25=145%;(60.0-25)/25=140%;(54-25)/25=116%soO检测VBA
断裂伸长率=(112%+120%+145%+140%+116%)/5=127%≥80%,合格。soO检测VBA |