论文部分内容阅读
利用了统计软件spss17.0对大量的各种配合比的双掺粉煤灰、矿粉及双骨料破碎卵石、碎石混凝土28d抗压强度进行了回归分析,建立了回归方程。分析了水泥、矿粉、粉煤灰、水胶比、破碎卵石及碎石对混凝土28d抗压强度的影响。分析结果表明:随着混凝土养护龄期的增加,混凝土的抗压强度也跟着增加;在固定用水量的条件下,混凝土的抗压强度与胶凝材料用量有关,胶凝材料用量越多强度越大。胶凝材料对混凝土28d抗压强度影响的大小顺序为:水泥(x1)>矿粉(x3)>粉煤灰(x2),且影响混凝土28d抗压强度的主要因素是水泥;在本实验范围内破碎卵石可以部分替代或全部替代碎石而不影响混凝土28d抗压强度。
The statistical software spss17.0 was used to regression analysis the compressive strength of a large number of various blended fly ash, ore fines, and double aggregate broken pebbles and gravel concrete for 28 days, and a regression equation was established. The influence of cement, mineral powder, fly ash, water-binder ratio, broken pebbles and gravel on the compressive strength of concrete for 28 days was analyzed. The analysis results show that with the increase of concrete curing age, the compressive strength of concrete also increases; under the condition of fixed water consumption, the compressive strength of concrete is related to the amount of cementitious material, and the more the amount of cementitious material is used, the stronger the strength is. Big. The order of the impact of cementitious materials on the compressive strength of concrete for 28 days is: cement (x1)> mineral powder (x3)> fly ash (x2), and the main factor affecting the compressive strength of concrete 28d is cement; in the scope of this experiment The inner shattered pebbles can partially or completely replace the gravel without affecting the compressive strength of the concrete 28d.