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Author index ►Salim Safiddine, Farid Debieb, El-Hadj Kadri, Belkacem Menadi, Hamza Soualhi
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Effect of crushed sand and limestone crushed sand dust on the rheology of cement mortar
Appl. Rheol. 27:1 (2017) 14490 (9 pages) ►
This paper investigates the influence of limestone crushed sand dust (LCSD) on rheological properties of cement mortar based on crushed sand (CS) with different mineralogical nature (limestone and siliceous). A LCSD with a specific surface BET of 1470 m2/kg was used at different content replacement by mass of sand (0, 5, 10, 15, and 20 %). The water-cement ratio (W/C) and the cement content were kept constant for all mixes. The results show that the slump decreased as well as the flow time, the yield stress and the viscosity of mortar increased with the increase in LCSD content. Thus, the mortar based on limestone crushed sand (LS) has a low loss of rheological properties compared with a mortar based on siliceous crushed sand (SS). Yet, for 0 % of LCSD, it was found that the rheological properties are nearly equal for both CSs. The use of superplasticizer (Sp) significantly improves the workability and rheological properties. However, the rheological behavior of mortar has been strongly affected by increasing the volume concentration of CS whereas the effect of CS on fresh mortar presents significantly greater disadvantages compared with rolled sand (RS).► Cite this publication as follows:
Safiddine S, Debieb F, Kadri E, Menadi B, Soualhi H: Effect of crushed sand and limestone crushed sand dust on the rheology of cement mortar, Appl. Rheol. 27 (2017) 14490.
Hamza Soualhi, El-Hadj Kadri, Tien-Tung Ngo, Adrien Bouvet, Francois Cussigh, Said Kenai
A new vane rheometer for fresh mortar: development and validation
Appl. Rheol. 24:2 (2014) 22594 (7 pages) ►
This paper presents the development of a vane rheometer to estimate mortar plastic viscosity and yield stress. The rheological parameters were developed from measurements using a procedure to convert the vane torque and rotational velocity data into shear stress versus shear rate relationships. The used procedure considered the locally sheared material as a Bingham fluid and computed the characteristic shear rate from Couette analogy. The apparatus was tested with three experimental programs in which many rheological parameters of mortar compositions were calculated. The obtained results validated the rheometer test procedure and confirmed that the test results are reproducible.► Cite this publication as follows:
Soualhi H, Kadri E, Ngo T, Bouvet A, Cussigh F, Kenai S: A new vane rheometer for fresh mortar: development and validation , Appl. Rheol. 24 (2014) 22594.
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