Research On Constructed Quality For Concrete In Winter Of Cold Regions

In the northern China provinces in cold areas, to have a year for three to six months ofcold season, in order to meet the needs of the project schedule, a large number of constructionengineering need in winter concrete engineering construction, but low temperature can causecast-in-situ concrete component of early frost, greatly reduce its safety and durability,therefore, must be on the winter concrete engineering to take corresponding measures toensure the smooth construction of concrete.This paper, from the winter concrete construction to the theoretical analysis, to discussthe principle, the winter construction of concrete construction technology, the winter concretecuring process and concrete for the content such as harmony, and according to oneself, after ayear of tracking the construction process, familiar with the various construction technology ofwinter construction, all the sectors of record key points and matters needing attention, foundthe concrete’s early frost is throughout the entire winter construction of the key points, thisarticle puts forward the construction scheme selection, raw material preparation andmaintenance method, different from the normal temperature of the construction need somespecial measures, such as the inability to take reasonable winter construction measure, willresult in the occurrence of freeze-thaw phenomenon, which can lead to significantly reducethe strength of concrete increase, and the safety of the late on concrete durability and causegreat damage; In order to research the scientific nature of the subject is the concrete analysisthrough test different water cement ratio and add two materials as well as a variety ofdifferent maintenance way than with the standard maintenance the compressive strength ofconcrete influence of late.The results of the study show that, in the preparation of concrete by adding air-entrainingagent, fly ash and slag concrete compressive strength will be enhanced in standardmaintenance after6h turn-8℃under7d again into the standard maintenance maintenance28 d concrete, the compressive strength weak in standard maintenance and d concrete, and whenstandard maintenance after48h turn-8℃under7d again into the standard maintenancemaintenance28d concrete, the compression strength of standard maintenance28d better thanthe concrete.In addition, through the study and combined with tracking in the theoretical research,and on the basis of the construction process from Angle, including strict selection of rawmaterials, the reasonable proportion design, appropriate maintenance method, the temperaturecontrol of the necessary and strict site management of xian xue family village villagesresettlement project put forward a set of construction scheme to winter.To sum up, the cold region winter concrete construction quality control research toshorten the winter construction period, to speed up the process of project construction, projectinvestment benefit is as early as possible play a positive role in promoting, also on the winterconcrete construction theory and method can be a reference and a practical guide.