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Ni'erji water conservancy project in Inner Mongolia Autonomous Region Dawa Autonomous Banner and , Nehe County , Heilongjiang Province at the junction of Nenjiang arrangements , according to the construction schedule , construction of the asphalt concrete core wall from April to October . Asphalt concrete core wall dam, built for frigid region of northeastern May to September is the golden season of the dam asphalt concrete cutoff wall construction , but since July to early September , the northeast region of the main flood season , more rainfall , asphalt less concrete core wall construction days 1 to April 10 to December for many years the average temperature ( to -22.0 ° C and -17.3 ° C , -6.6 ° C , 4.4 ° C , 2.8 ° C , -9.7 ° C - 19.2 ℃) were lower than the normal the construction daily temperature standard specification requires 5 ° C [ the \More days due to the geographical location of the project in April and October daytime temperatures of greater than 5 ℃ , but the night temperature is below 5 ℃ or even negative temperature , the temperature difference between day and night and cause changes in the larger , lower average daily temperature results . Thus, in April and October , to take certain construction measures rolled asphalt concrete core wall construction , asphalt concrete core wall construction will increase the number of active days , construction strength will be reduced, as well as to shorten dam the construction period , and created favorable conditions for the early completion of the project . This article focuses on the basis of the test ( laboratory and field trials) (0 ~ 5 ℃) under the conditions of compacted asphalt concrete core wall construction technology research , suitable Nierji
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