【摘要】 采用简易可行的技术途径，配制了具有良好工作性的Ｃ７０～Ｃ８０高强混凝土，分析了其力学特性，实验结果表明，高强混凝土的抗压强度均随时间而增长，早期强度发展快，后期强度发展速度减慢，但仍持续增长，达１６００ｄ后，仍有发展趋势，强度发展与时间成指数关系。更多还原

【Abstract】 in this paper,the C70￣C80(70￣80 MPa) high strength concrete with goodworkability is prepared in simple and feasible techanical way.The mechanical behaviour ofhigh strength concrete is anlysised also. Experimental results show that the compressivestrength of high strength concrete increases with the age.Early strength develops rapidlylater the rate of strength development is slow down gradully.However,its strength stillcontinue to increase.At the age of 1 600 days,the strength still keeps increasing.Thestrength of concrete is a index function of its age.更多还原