Yog vim li cas tsis yog dej tuav ntawm masonry mortar siab dua qhov zoo

Kev ruaj ntseg ntawm cov dejmasonry mortaryog ib qho tseem ceeb vim nws cuam tshuam rau kev ua haujlwm, sib xws, thiab kev ua haujlwm ntawm cov tshuaj khib nyiab. Txawm hais tias nws muaj tseeb tias kev tuav dej yog ib qho khoom tseem ceeb, nws tsis yog qhov tseeb tias kev tuav dej ntau dua yog qhov zoo dua. Muaj ntau qhov laj thawj rau qhov no:

1. Kev ua haujlwm tau zoo: Kev tuav dej siab tuaj yeem ua rau ntub dej ntau dhau thiab nplaum nplaum, uas tuaj yeem ua haujlwm nyuaj nrog thiab yuav ua rau muaj teeb meem xws li sagging lossis slumping ntawm mortar thaum thov.
2. Bond zog: Qhov sib piv ntawm dej-rau-cement yog qhov tseem ceeb hauv kev txiav txim siab lub zog ntawm mortar. Kev tuav dej ntau dhau tuaj yeem ua rau muaj qhov sib npaug ntawm cov dej-rau-cement ntau dua, uas tuaj yeem txo qhov kev sib txuas ntawm cov tshuaj khib nyiab.
3. Durability: Kev tuav dej siab kuj tseem tuaj yeem cuam tshuam rau kev ua haujlwm ntawm lub mortar. Cov dej noo ntau dhau tuaj yeem ua rau muaj kev nqus dej ntxiv thiab muaj peev xwm khov-thaw puas tsuaj hauv cov huab cua txias.
4. Shrinkage: Kev tuav dej siab kuj tuaj yeem ua rau muaj kev sib tsoo thiab tawg ntawm cov tshuaj khib nyiab, uas tuaj yeem cuam tshuam qhov kev ncaj ncees ntawm cov qauv masonry.

Nyob rau hauv cov ntsiab lus, thaum tuav dej yog ib qho tseem ceeb ntawm masonry mortar, nws tsis yog ib txwm yog hais tias qhov siab dua cov dej tuav, qhov zoo ntawm cov mortar. Sib npaug dej tuav nrog lwm yam khoom tseem ceeb xws li kev ua haujlwm, kev sib koom ua ke, kev ua haujlwm ntev, thiab shrinkage yog qhov tseem ceeb hauv kev ua tiav cov khoom zoo siab uas ua tau raws li qhov xav tau ntawm daim ntawv thov tshwj xeeb.