Modified R³ testing has been used to classify four different SCMs, namely, limestone, pumice, slag, and densified silica fume. Cementitious pastes were prepared by replacing ordinary portland cement with SCMs at different replacement levels – 20%, 40%, and 60% for limestone, pumice, and slag and 5%, 10%, and 15% for silica fume. The influences of SCM replacement level on heat flow, heat release, calcium hydroxide consumption, bound water contents, compressive strength, and bulk resistivity for a period of 56 days were quantified. The SCMs have widely varying effects on these properties as a function of replacement levels, however, in general, inert and reactive SCMs show little difference in properties at early ages and lower replacement levels (20%). The impacts of SCMs on cementitious paste properties are more apparent at higher replacement levels (40%–60%) and at later ages (28 and 56 days). These findings have important implications in practice and suggest that standard ASTM strength activity index testing could be improved by testing at higher replacement levels. In addition, bulk resistivity shows ability to differentiate inert and reactive materials and could be a potential candidate for standardization. The ratio of heat release to calcium hydroxide consumption obtained from the modified R³ test shows a strong correlation with the relative compressive strength of SCMs at different replacement levels and could be used to explore links between reactivity testing, SCM replacement, and paste property evolution.

改良版R ³测试已用于对四种不同的SCM进行分类，即石灰石，浮石，矿渣和致密硅粉。通过用不同替代水平的SCM替代普通硅酸盐水泥来制备水泥浆-石灰石，浮石和矿渣为20％，40％和60％，硅灰为5％，10％和15％。量化了SCM置换水平对56天期间的热流，热量释放，氢氧化钙消耗，束缚水含量，抗压强度和体积电阻率的影响。SCM对这些性能的影响程度随取代水平的变化而变化很大，但是，一般而言，惰性和反应性SCM早期性能和较低的取代水平（20％）的性能差异不大。在较高的替代含量（40％–60％）和更高的龄期（28和56天）下，SCM对水泥浆性能的影响更加明显。这些发现在实践中具有重要意义，并表明可以通过在更高的替代水平下进行测试来改进标准的ASTM强度活性指数测试。另外，体电阻率显示出区分惰性和反应性材料的能力，并且可能成为标准化的潜在候选者。改性R获得的热量释放与氢氧化钙消耗的比率 体电阻率显示出区分惰性和反应性材料的能力，并且可能成为标准化的潜在候选者。改性R获得的热量释放与氢氧化钙消耗的比率 体电阻率显示出区分惰性和反应性材料的能力，并且可能是标准化的潜在候选者。改性R获得的热量释放与氢氧化钙消耗的比率³测试表明，在不同的替换水平下，SCM的相对抗压强度具有很强的相关性，可用于探索反应性测试，SCM替换和糊剂性能演变之间的联系。