@article{MAKHILLJEAS20094313110,
    title = {Central Composite Design Models for Workability and Strength of Self-Compacting Concrete},
    journal = {Journal of Engineering and Applied Sciences},
    volume = {4},
    number = {3},
    pages = {177-183},
    year = {2009},
    issn = {1816-949x},
    doi = {jeasci.2009.177.183},
    url = {https://makhillpublications.co/view-article.php?issn=1816-949x&doi=jeasci.2009.177.183},
    author = {Arabi N.S. Al,Hashem,Kamal Nasharuddin and},
    keywords = {numerical models,design model,self-compacting concrete,statistical models,Workability,strength},
    abstract = {A central composite design models was carried out to model the influence of key mixture parameter on fresh and hardened properties affecting the performance of Self-Compacting Concrete (SCC). Such responses included slump flow as a filing ability, L-Box as a passing ability and sieve analysis as resistance to segregation. Thirty-one mixtures were prepared to derive the numerical models and evaluate the accuracy. The models are valid for a wide range of mixture proportioning. The study presents, the derived numerical models that can be useful to reduce the test procedures and trials needed for the proportioning of self-compacting concrete. The qualities of these models were evaluated based on several factors such as level prediction, residual error, residual mean square and correlation coefficients.}
    }