[Civil Engineering Version] Daily Question 20180122
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After the main structural renovation of a residential building passed the inspection, it entered the phase of interior decoration work. During the plastering work, on-site technicians observed that the workers carried out the following construction practices, among which the incorrect ones are ( ). a. For the plastering at the junction of concrete columns and partition walls (made of ceramsite concrete blocks), the method of applying a wire mesh first and then carrying out plastering should be used.b. Fine sand should be used for plastering; when mixing the sand on site, the ingredients must be added in strict accordance with the specified ratio.
c. The strength of the lime mortar plastering layer on the existing walls is M5, while the workers use cement mortar with a strength of M5.5 for the surface layer construction.
d. When using cement mortar or mixed cement mortar for plastering, the next layer should be applied only after the previous layer has set ； When applying plaster with lime mortar, the next layer should be applied only after the previous layer is about 70-80% dry. e) The curing time for the lime paste used in plastering should be no less than 7 days. The curing time for the finish made from ground lime powder should not be less than 3 days. Correct answer: bce
After the main structural renovation of a residential building passed the inspection, it entered the phase of interior decoration work. During the plastering work, on-site technicians observed that the workers carried out the following construction practices, among which the incorrect ones are ( BCE ). a. For the plastering at the junction of concrete columns and partition walls (made of ceramsite concrete blocks), the method of applying a wire mesh first and then carrying out plastering should be used.
b. Fine sand should be used for plastering; when mixing the sand on site, the ingredients must be added in strict accordance with the specified ratio.
c. The strength of the lime mortar plastering layer on the existing walls is M5, while the workers use cement mortar with a strength of M5.5 for the surface layer construction.
d. When using cement mortar or mixed cement mortar for plastering, the next layer should be applied only after the previous layer has set ； When applying plaster with lime mortar, the next layer should be applied only after the previous layer is about 70-80% dry. e) The curing time for the lime paste used in plastering should be no less than 7 days. The curing time for the finish made from ground lime powder should not be less than 3 days
b. Fine sand should be used for plastering; when mixing the sand on site, the ingredients must be added in strict accordance with the specified ratio.
c. The strength of the lime mortar plastering layer on the existing walls is M5, while the workers use cement mortar with a strength of M5.5 for the surface layer construction.
d. When using cement mortar or mixed cement mortar for plastering, the next layer should be applied only after the previous layer has set ； When applying plaster with lime mortar, the next layer should be applied only after the previous layer is about 70-80% dry. e) The curing time for the lime paste used in plastering should be no less than 7 days. The curing time for the finish made from ground lime powder should not be less than 3 days