TY - JOUR
T1 - Experimental study and modeling of rheological and mechanical properties of NHL grouts
AU - Baltazar, Luis G.
AU - Henriques, Fernando M. A.
AU - Cidade, Maria Teresa
N1 - info:eu-repo/grantAgreement/FCT/3599-PPCDT/104376/PT#
The support from the strategic project Pest-C/CTM/LA0025/2011
PY - 2015/12/1
Y1 - 2015/12/1
N2 - This paper aims to model the effect of grout composition on properties of two natural hydraulic lime (NHL) grouts based on the correlation between grout rheometer results and simple flow tests. First, the effects of water:binder ratio and superplasticizer dosage on its rheological properties and flowability were analyzed. Dosage of superplasticizer and water:binder ratio were varied from 0.6 to 1.2% (by mass of binder) and 0.45-0.55, respectively. A good correlation between classical flow tests and the rheological properties was obtained. Then, statistical models were formulated in order to estimating the grout parameters, such as plastic viscosity and yield stress just by performing simple flow tests. The models coefficients were calculated using multiple regression analysis. The statistical modeling results indicated that the properties of the grouts studied are linearly related to water:binder ratio, superplasticizer dosage, and specific surface area of natural hydraulic limes. Finally, the accuracy of the models was experimentally confirmed using random grout compositions. The predicted-to-measured ratio ranged from 0.97 to 1.08, indicating a good agreement between the confirmation results and the expected results from the statistical models.
AB - This paper aims to model the effect of grout composition on properties of two natural hydraulic lime (NHL) grouts based on the correlation between grout rheometer results and simple flow tests. First, the effects of water:binder ratio and superplasticizer dosage on its rheological properties and flowability were analyzed. Dosage of superplasticizer and water:binder ratio were varied from 0.6 to 1.2% (by mass of binder) and 0.45-0.55, respectively. A good correlation between classical flow tests and the rheological properties was obtained. Then, statistical models were formulated in order to estimating the grout parameters, such as plastic viscosity and yield stress just by performing simple flow tests. The models coefficients were calculated using multiple regression analysis. The statistical modeling results indicated that the properties of the grouts studied are linearly related to water:binder ratio, superplasticizer dosage, and specific surface area of natural hydraulic limes. Finally, the accuracy of the models was experimentally confirmed using random grout compositions. The predicted-to-measured ratio ranged from 0.97 to 1.08, indicating a good agreement between the confirmation results and the expected results from the statistical models.
KW - Grout
KW - Marsh cone test
KW - Minislump test
KW - Natural hydraulic limes
KW - Rheology
KW - Superplasticizer
UR - http://www.scopus.com/inward/record.url?scp=84947712557&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)MT.1943-5533.0001320
DO - 10.1061/(ASCE)MT.1943-5533.0001320
M3 - Article
AN - SCOPUS:84947712557
SN - 0899-1561
VL - 27
JO - Journal of Materials in Civil Engineering
JF - Journal of Materials in Civil Engineering
IS - 12
M1 - 04015055
ER -