Currently C937 only allows mixing of trial batches in the mixer shown in Fig. 1 of C938. It is felt that allowance should be made to mix the trial batches according to project specifications and equipment with the C938 mixer still to be used if no specifications exist. Concurrent to the ballot change wording is being proposed for C938 and C939 to harmonize this change.
Keywordsefflux time; fluidifier; grout; pre-placed aggregate; water demand; water retentivity; Concrete construction materials/applications--specifications; Grout fluidifier; Grouts (preplaced-aggregate (PA) concrete); Preplaced-aggregate (PA) concrete;
Draft Under Development