Application of Concrete Containing Large Quantity of Inorganic By product Powders

本文对含大量无机副产粉混凝土的应用方法进行了探讨。大体积混凝土试验证明，掺加大量粉煤灰的混凝土的温升低于不掺粉煤灰的混凝土，但前者的抗压强度高于后者。高流动性混凝土试验证明，粉煤灰用量大的高流动性混凝土流动性好，易于填充模板。拆除模板后，使用该混凝土的实尺寸试件表面清晰细腻，不易染色。此外，从长期来看，这些试件表现出更高的强度和更低的收缩率。高强度混凝土试验证明，大量掺加粉煤灰、石灰石粉、石粉等无机副产物粉的混凝土抗压强度高，且掺量越大，混凝土强度越高。结果表明，采用几种集料或副产物粉配制的上述混凝土对碱硅反应有一定的预防作用。经验证，上述混凝土使用几种副产物，可有效防止因使用再生骨料而导致强度下降。

In this study, application methods of concretes containing large quantity of inorganic by-product powders were discussed.1.Mass ConcreteIt was certified that the temperature rise of the concrete using large quantity of coal ash was lower than the concrete without coal ash, though the compressive strength of the former was higher than that of the later.2.High Fluidity ConcreteIt was certified that the high fluidity concretes using large quantity of coal ash showed high fluidity and were easy to be filled into formworks. After the removal of formworks, the surfaces of real size specimens using this concrete were clear and fine, and hard to be stained. Further, these specimens showed higher strength and lower shrinkage toward the long term.3. High Strength ConcreteIt was certified that the compressive strength of the concretes using large quantity of inorganic by-product powder, for example coal ash, lime stone powder or crushed stone powder, showed high strength, and the greater the amount of these powders the greater the strength of concrete.4.Alkali Silica ReactionIt was verified that the above mentioned concrete using several kind of aggregates or by-product powders had prevention effect against alkali silica Reaction.5.Recycled Aggregate ConcreteIt was verified that the above mentioned concrete using several kind of by-product prevented strength drop due to the use of recycled aggregates.