| 摘要 |
FIELD: construction industry. ^ SUBSTANCE: concrete or mortar beam is tested for bending. Loads are applied to beam with gradual load weight increase. Then beam deflections are measured in the direction of load action, and conditional-linear "load weight - deflection" dependence is determined, and concrete or mortar elasticity modulus is calculated from the following expression, MPa: E=((Pmax.L3 )/(48.fel.I)).K. Load with weight Pmax is applied to beam within 180 days, and beam deflections are measured from time to time in the direction of load action, and creep coefficient is calculated from the expression: ϕ=(f180-fel)/fel, and creep measure, MPa-1, is calculated from the expression: C0=ϕ/E, where Pmax is maximum load weight value from specified area, kg, L is working beam span, cm, fel is beam deflection at Pmax, cm, I is inertia moment of beam section equaling to (b.h3 )/12, cm4, b is beam width, cm, h is beam height, cm, K is coefficient, cm2.MPa/kg, f180 is beam deflection in 180 days, cm. ^ EFFECT: reducing duration and labour cost of tests, improving test results' accuracy, and no need to use expensive complex equipment. ^ 2 tbl, 1 ex, 4 dwg |
