Some conclusions are drawn : the compressive strength and flexural strength of cubic specimens of steel fibre reinforced concrete increase with the dosage of steel fibre ; without change of dosage of steel fibre , the elastic modulus of steel fibre reinforced concrete increases with the concrete age ; steel fibre reinforced concrete is of obvious function in cracking resistance , but there is no obvious function in avoidance of cracking ; for both common concrete and steel fibre reinforced concrete , the variation of the internal temperature is different from that of the external temperature before the initial set of concrete , and the internal strain of both two kinds of concrete is great , and , in general , the variation of strain of common concrete is much greater than that of the steel fibre reinforced concrete ; after the initial set of concrete , the variation of the internal temperature of both two kinds of concrete is similar to that of the external temperature , and the variation of the internal strain is relatively small 結(jié)果表明:鋼纖維混凝土立方體的杭?jí)簭?qiáng)度、抗彎強(qiáng)度隨著鋼纖維摻量的增加而增大;在鋼纖維摻量不變的情況下,鋼纖維混凝土的抗壓彈性模量會(huì)隨著齡期的增加而提高;鋼纖維對(duì)混凝土的阻裂作用很明顯,而對(duì)混凝土起裂的限制作用不明顯;在混凝土初凝之前,無論是普通混凝土還是鋼纖維混凝土,內(nèi)部溫度的變化規(guī)律與外界溫度的變化規(guī)律不同,并且此階段混凝土內(nèi)部應(yīng)變的變幅很大,普通混凝土應(yīng)變的變幅要比鋼纖維混凝土應(yīng)變的變幅大得多;在混凝土初凝之后,無論是普通混凝土還是鋼纖維混凝土,內(nèi)部溫度的變化規(guī)律與外界溫度的變化規(guī)律相同,并且此階段混凝土內(nèi)部應(yīng)變的變幅很小。