A heat of neutralization test method (as modified by the bureau of reclamation) for determining cement content of freshly mixed soil-cement is discussed. Once a calibration curve is established, a cement content determination can be made in approximately 15 min, whichin field applications has been found to be accurate to within plus or minus 1 percentage point of actual cement content. A sodium acetate-glacial acetic acid buffer solution is used to initiate an exothermic reaction with the calcium hydroxide in the soil-cement test specimen. During construction, test specimens are obtained directly from the spreader as soil-cement is placed, and separation of plus no. 4 (4.75-Mm) sieve size material is not required. Results from an interlaboratory testing program were analyzed to establish precision and bias of the suggested test method. This paper appears in transportation research record no. 1295, Soil stabilization 1991 .
Samenvatting