Linyi Fertilizer Network Copyright
Crops can be directly absorbed and utilized by crops in low temperature seasons such as autumn and winter and early spring. Urea needs to be converted into ammonium nitrogen by urease to be absorbed by roots. The rate of urea conversion depends mainly on the soil temperature at that time. Generally, it takes 7 to 10 days at a ground temperature of 10 ° C, 4 to 5 days at 20 ° C, and only 2 to 3 days at 30 ° C. It can be seen that the crops are topdressed in winter or early spring, and the application of ammonium hydrogencarbonate is faster than urea. Linyi Fertilizer Network Copyright
The high utilization rate of ammonium bicarbonate is rarely volatilized when the temperature is lower than 20 ° C. After being applied to the soil, the ammonium ion can be quickly adsorbed by the soil colloid, and its adsorption force is 8 times that of urea, which is not easy to be lost with water. Urea exists in a molecular state before it is converted, and it is difficult to be adsorbed by the soil colloid and is easily lost. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
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Segmental Assembly Formwork
The segment assembly formwork system is a new type of non-standard mechanical equipment applied to prefabricated cantilever assembly segment beams.
Through the analysis and demonstration of segment assembly technology at home and abroad, combined with previous experience in the design, production and construction of bridge formwork, after BY1203 and BY1306, the BY1507 automatic segment box girder prefabrication system was developed and launched. The segmental assembly template includes five parts: outer mold system, bottom mold system, blocking system (fixed end mold and mobile end mold), inner mold system and bottom mold trolley. The advantages of this method are that it occupies a small area, is easy to operate, is relatively small due to terrain restrictions, is relatively convenient to arrange beam fields, and has a high utilization rate of pedestals and templates.
Segmental Formwork,Assembly Formwork,precast concrete formwork,concrete shuttering
Anshan Lijian Engineering Group Co. LTD , https://www.lijianformwork.com