Results of the compressive and flexural strength development at −10 °C, −5 °C, 0 °C and 5 °C after curing for 1 day, 3 days and 14 days are shown in Figs. 2 and 3. At the same curing age, the compressive strength of both samples without silica fume and samples with silica fume grew with the increase of temperature. An apparent change of the compressive strength growth can be seen when the temperature increased from 0 °C to 5 °C. At curing age from 3 days to 7 days, compressive strengths of the cement mortars at each temperature all increased to a significant extent. When the curing age reached 14 days, growth of the strength was slower at high temperature. It can be seen from Fig. 3 that the flexural strength of the cement mortars also increased with curing temperature. But high temperature appears to weaken this trend with the increase of curing age. Specifically, as curing age grows, the strengths at each temperature tend to get closer.