Abstract
It is the key to the concrete repair and strengthening construction that the base concrete has a certain quality and strength. Based on the strengthening mechanism of sodium silicate, the sodium silicate was modified to develop a kind of compound strengthening liquid. Through the contrast test results of concrete impregnation. The strength of C5 concrete before and after strengthening is increased by 42.5%, while the strength of C10 concrete is increased by 21.4%, and the strength of C15 concrete is increased by 10%.
Highlights
It is very common and serious that the durability damage of the outdoor concrete structure support in the coastal substation, which causes the aging and deterioration of concrete in different degrees[1,2]
The treatment of concrete base includes eliminating the defects such as floating slurry, weathering and spalling, and chiseling base to meet the requirements of certain roughness[4~7], so as to ensure that repair and reinforcement materials and base concrete bond strength enough to ensure that damage does not occur at the interface
4.1 Compressive strength of concrete reinforced with modified sodium silicate composite reinforcement solution It can be seen from the comparison of the compressive strength of concrete reinforced by modified sodium silicate composite reinforcing liquid (Fig. 2, Table 2) that the strength of C5 grade concrete increases by 42.5%, that of C10 grade concrete increases by 21.4%, and that of C15 grade concrete increases by 10%
Summary
It is very common and serious that the durability damage of the outdoor concrete structure support in the coastal substation, which causes the aging and deterioration of concrete in different degrees[1,2]. The treatment of concrete base includes eliminating the defects such as floating slurry, weathering and spalling, and chiseling base to meet the requirements of certain roughness[4~7], so as to ensure that repair and reinforcement materials and base concrete bond strength enough to ensure that damage does not occur at the interface. It is difficult the concrete base treatment construction as to cause dust and other environmental problems, especially for the construction of the outdoor concrete support of the substation. The test results showed that the surface hardness of concrete reached 9.0 after 7 days
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