In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Become an ACI Member
Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
American Concrete Institute
38800 Country Club Dr.
Farmington Hills, MI
Feedback via Email
Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Influence of Bentonite Cement on the Pumpability of Compaction Grouts
Author(s): Roy Borden and Daniel M. Groome
Publication: Special Publication
Appears on pages(s): 115-128
Keywords: admixtures; bentonite; compacting; grout; grouting;
Abstract:Prediciting production pumping rates is an important part of estimating the required time and resultant cost of completing a particular grouting project. Due to the very stiff nature of low-slump grouts, pumping at economical flow rates can require the use of very high pressures. In practice, numerous admixtures are used to increase the "pumpability" of these stiff grouts, as definged by the lowering of the pressure required ot achieve a given flow rate. In this experimental study, the influence of the admixture bentonite, in amounts up to 15 percent of the pozzalan content, on the flow rate versus pumping pressure relationship, was investigated in field tests using production scale equipment. Constant diplascement piston pumps were used to achieve flow rates of up to 5cu. Ft./min. resulting in pumping pressures of up to 700psi. Over the range of flow rates and resultant pressures investigated an optimum bentonite content of 5 to 10 percent was achieve a given flow rate. The optimum bentonite content was observed ot increase from approximately 5 to 10 percent as the flow rate increased from slightly less than 1 cu. Ft./min. to about 4 cu. Ft./min.
Click here to become an online Journal subscriber