No abstract

The ability to accurately determine the workability and board life of mortars has been an important goal of the cement industry. This paper describes a new approach for more accurate determinations of the workability and board life, as well as other mortar properties, which has recently been developed. This simple approach uses a computerized mechanical apparatus to numerically measure the properties of fresh mortar. Data derived from this method have been shown to correlate well with characteristics observed by a professional mason during parallel tests. This new device provides results that are more reproducible, reliable, and accurate than results from periodic penetration tests.

No abstract

This reportwaspreparedas an accountof worksponsoredby an agencyof the LlnitedStates Government.Neitherthe UnitedStates Government norany agencyth,.=reof, noranyof their employees, makesany warranty, expressor implied,or assumesanylegal liabilityorresponsibilityfor the accuracy, completeness, or usefulness of any information, apparatus, product, or processdisclosed, or represents that its use wouldnot infringeprivatelyownedrights.Referencehereinto any specific commercial product, process, orservice bytradename, trad.mark, manufacturer, or otherwise dotsnot necessarily constitute or implyits endorsement, ,ccommendation, or favoring by the UnitedStates Government or anyagency thereof. The views andopinions of authors expressed herein do not necessarily stateor reflectthose of the, United States Government or anyagency thereof.

Energy Conservation ]-_oterll. ia] of Portland Cemer_l. Part jc:a] S.ize Distribut.ion Control Phase ] I] im_)ro\'ed Con'troJ of \he P'inish Grinding Process in Cement .Manufacture