建筑工程知识详解16.17.18（Detailed knowledge of construction engineering 16.17.18）.doc

建筑工程知识详解16.17.18（Detailed knowledge of construction engineering 16.17.18） The construction technology of masonry structure A mortar mix proportion Ratio should be a qualified laboratory with 1. mortar, according to the actual situation with sure and meet at the same time, thick The degree of stratification, and the requirements of the compressive strength. 2. mortar consistency in masonry material is porous and rough water block larger or masonry in hot dry conditions, should be The use of mortar larger density value, and should choose smaller mortar consistency. 3. construction when using cement mortar to replace cement mixed mortar, mortar strength grade should be re established and with the same design Italy. Mixing and mortar 1. mortar mixing, components of materials should be used for weight metering. 2. mortar should adopt mechanical agitation. The mixing time from feeding end date, should be: (1) cement mortar and cement mortar, shall not be less than 2min; (2) fly ash cement mortar and mortar mixed with additives, not less than 3 min; (3) organic plasticizer with lime mortar, should be 3 ~ 5min. 3. mortar should be mixed with the use of cement mortar and cement mortar shall be mixed after use respectively in 3H and 4H when the construction period; Among the highest temperature is over 30 DEG C, respectively in 2H and 3H mixed after use. Mortar strength The length of the 7.07cm cube specimens after 28d standard curing, the measured compressive strength of a group of six test pieces in value To assess. Two, brick masonry engineering (a) building brick According to the compressive strength of brick are divided into MU30, MU25, MU20, MU15, MU10 five grades. (two) brick masonry 1. 31 masonry masonry method method, squeezing method (slurry paving method), scraping method and a grey method four. Usually adopt the three A masonry masonry method is a method, shovel ash, a brick, a kneading pressure. When the mortar masonry mortar method, not the length of More than 7