Effect of fine aggregate characteristics on the thresholds of self-compacting paste rheological properties. (30th July 2016)

• Record Type: Journal Article
• Authors: Zhang, Jingbin; An, Xuehui; Nie, Ding
• Is Part Of: Construction & building materials. Volume 116(2016)
• Page Start: 355
• Page End: 365
• Publication Date: 2016-07-30
• Subjects: Self-compacting concrete -- Sand specific area -- Flowability -- Segregation resistance -- Paste rheological thresholds -- Fine aggregate properties; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2016.04.069
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Fine aggregate characteristics consist of gradation and content. Fine aggregate gradation is quantified by specific surface area. The rheological properties of mortar is impacted by fine aggregate characteristics. Paste rheological thresholds were achieved through experiments. SCC workability could be predicted from the paste rheological thresholds. Abstract: This work studies the effect of fine aggregate characteristics on the thresholds of self-compacting paste rheological properties. Fine aggregate characteristics consist of gradation and content. The specific surface area (SSA) was used to quantitatively describe the gradation of fine aggregate. The most lenient criteria for qualified mortar were formulated from the view of yield stress and plastic viscosity. Mortar experiments were conducted by separately changing the SSA and sand ratio. For each combination, a series of mortar and corresponding paste experiments were performed by adjusting the water-cement ratio and the superplasticizer dosage to obtain paste rheological thresholds. Experimental verification tests on self-compacting concrete (SCC) was conducted. This method can be easily implemented with wide scope of sand gradation and content. Using this method, the aim of predicting the SCC workability from the rheological characteristics of paste was achieved.