Effect of High-Range Water-Reducing Admixture Chain Lengths on Self-Consolidating Concrete

2022 ◽  
Author(s):  
Süleyman Özen ◽  
Muhammet Gökhan Altun ◽  
Ali Mardani-Aghabaglou ◽  
Kambiz Ramyar
Keyword(s):  
Self Consolidating Concrete ◽  
Chain Lengths ◽  
High Range

scholarly journals Rheological Method for Alpha Test Evaluation of Developing Superplasticizers’ Performance: Channel Flow Test

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Jae Hong Kim ◽  
Jin Hyun Lee ◽  
Tae Yong Shin ◽  
Jin Young Yoon
Keyword(s):  
Channel Flow ◽  
Test Method ◽  
Test Evaluation ◽  
Test Results ◽  
Self Consolidating Concrete ◽  
Mix Proportion ◽  
Flow Test ◽  
Rheological Method ◽  
New Type ◽  
High Range

Advance in high-range water-reducing admixture revolutionizes the workability and constructability of conventional vibrated concrete as well as self-consolidating concrete. Its need from construction fields has increased, and consequently a variety of new-type polycarboxylates, base polymers for the admixture, are being formulated in these days. Synthesizing new polymers needs a quick, but reliable, test to evaluate its performance on concrete. The test is also asked for selecting the best applicable brand of them before a test concrete will be mixed. This paper proposes a “channel flow test” and its usage for the purpose. The proposed procedure for the test includes the mix proportion of a test mortar, the test method, and rheological interpretation of the test results.

Flowing ability of self-consolidating concrete and its binder paste and mortar components incorporating rice husk ash

2010 ◽  
Vol 37 (3) ◽  
pp. 401-412 ◽  
Author(s):  
Md. Safiuddin ◽  
J. S. West ◽  
K. A. Soudki
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Flow Time ◽  
Test Results ◽  
Self Consolidating Concrete ◽  
Concrete Mixtures ◽  
Slump Flow ◽  
High Range

This paper presents the flowing abilities of various self-consolidating concretes (SCCs) and their binder paste and mortar components. The binder pastes and mortars were formulated from the concrete mixtures and tested for flowing ability with respect to flow time and flow spread, respectively, at various dosages of high-range water reducing admixture (HRWRA). The concrete mixtures were prepared with different water (W) to binder (B) ratios and rice husk ash (RHA) contents. The flowing ability of the concretes was measured with regard to slump flow, orimet flow time and flow spread, and inverted slump cone flow time and flow spread. The test results reveal that the W:B ratio, RHA content, and HRWRA dosage significantly influenced the flowing abilities of the binder pastes, mortars, and concretes. In addition, the flowing ability of the SCCs was well correlated with the flowing abilities of their binder paste and mortar components, except for the mortars including RHA.

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