Experimental design to optimize high-volume of fly ash grout in the presence of welan gum and superplasticizer

Title: Experimental design to optimize high-volume of fly ash grout in the presence of welan gum and superplasticizer
Author(s): M. Sonebi
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 35
Issue: 250
Issue date: 2002-07-01
Publication year: 2002
Pages: 373 - 380
Total Pages: 8
Nb references: 14
Language: English

Abstract: Applications such as soil,rock and oil-well grouting all require enormous amounts of cement and are good examples of areas where a high volume of f ly ash could partially replace cement to produce low-cost,environmentally saf and durable concrete.
There is an increasing need to identify the rheological properties of cement grout using a simple test to determine the fluidity,and other properties of underwater grouts such as washout resistance and compressive strength.
This paper presents statistical models developed using a factorial design which was carried out to model the influence of key parameters on properties affecting the performance of underwater grout.
Such responses of fluidity included mini-slump and flow time measured by Marsh cone,washout resistance,unit weight and compressive strength.
The models are valid for mixes with 0.
40 to 0.
60 water-to-cementitious materials ratio,0.
02 to 0.
08%of anti-washout admixture,by mass of binder,and 0.
6 to 1.
8% of superplasticizer,by mass of cementitious materials.
The grout was made with 50%of pulverized-fuel ash replacement,by mass of cementitious materials.
Also presented are the derived models that enable the identification of underlying primary factors and their interactions that inf luence th modelled responses of underwater cement grout.
Such parameters can be useful to reduce the test protocol needed for proportioning of underwater cement grout.
This paper highlighted the influence of W/CM and dosage of antiwashout admixture and superplasticizer on fluidity,washout resistance and compressive strength and attempted also to demonstrate the usefulness of the models to improve understanding of trade-offs between parameters.

Online publication: 2002-05-27
Classification: Technical Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/13752