建造师基础知识（Basic knowledge of Construction Engineer）.doc

建造师基础知识（Basic knowledge of Construction Engineer） 1, the moment of inertia of the unit are: M4 2, concrete structure environment category: Five 3, the staircase width B and height H: 2H+B=600-620mm 4, the human ear is most sensitive to 1000Hz voice audio. 5, steel plate size representation of thick long, more than 4M2 steel plate 6, stainless steel is iron chromium content in more than 12% alloy steel. 7, lime: CaCO3 8, Portland cement: P.O 9, cement strength grade with cement mortar specimens in 3 days and 28 days to assess. 10, the best heat resistance of slag cement, Portland cement is suitable for early requirements of high strength concrete. 11, the non active aggregate, it can avoid suffering and destruction of concrete alkali aggregate reaction. 12, mortar preferred in the sand, hollow rate of less than 25% is called solid masonry. 13, marble belongs to alkaline rocks. 14, the conifer wood floor dry density of not less than 0.32g/cm2. Hardwood is not less than 0.50g/cm2. 15, in the general engineering level measurement using DS3 type level. 16, ordinary theodolite DJ6. 17 artificial excavation reserved for the 15-30 layer of the soil without digging. 18, in the excavation of underground water level, water level should be reduced to the pit below 500mm. 19, after the excavation should be carried out before the measurement positioning, leveling line. 20, construction period, the foundation pit excavation section should be taken. 21, the brick foundation below a layer of ash seam is greater than 20mm application of fine stone concrete leveling. 22, slag cement, volcano ash cement mass concrete curing shall not less than 21 days. 23, large volume concrete pouring scheme: comprehensive layered, layered section, inclined layer. 24, brick, stone based features: good compression, good integrity, low cost. 25, the large volume concrete temperature difference between inside and outside the general control in 25 degrees. 26, the large volume should be covered and zhe af