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

Txawm hais tias kev tuav dej yog qhov tseem ceeb rau kev ua kom muaj dej kom zoo ntawm cov khoom siv cementitious thiab txhim kho kev ua haujlwm, kev tuav dej ntau dhau ntawm cov khoom siv masonry tuaj yeem ua rau muaj ntau yam tsis zoo. Ntawm no yog vim li cas lub hauv paus ntsiab lus ntawm "qhov siab dua cov dej tuav, qhov zoo dua" tsis muaj tseeb rau masonry mortar:

1. Txo Lub Zog: Kev tuav dej ntau dhau tuaj yeem ua rau cov cementitious muab tshuaj txhuam hauv cov tshuaj khib nyiab, ua rau cov cement qis dua ib chav tsev ntim. Qhov no ua rau txo lub zog thiab durability ntawm cov mortar hardened, cuam tshuam cov qauv kev ncaj ncees ntawm masonry ntsiab.
2. Nce Shrinkage: Kev tuav dej siab tuaj yeem ua rau lub sijhawm ziab ntawm cov tshuaj khib nyiab, ua rau lub sijhawm ntev thiab muaj kev pheej hmoo ntawm kev tawg tawg thaum ziab. Cov shrinkage ntau dhau tuaj yeem ua rau txo qis zog, nce permeability, thiab txo qis tsis kam rau huab cua thiab ib puag ncig yam.
3. Adhesion tsis zoo: mortar nrog dej ntau dhau tuaj yeem ua rau pom kev tsis zoo rau cov masonry units thiab substrate nto. Lub xub ntiag ntawm cov dej ntau dhau tuaj yeem cuam tshuam txoj kev loj hlob ntawm kev sib raug zoo ntawm cov mortar thiab cov masonry units, ua rau txo qis zog thiab muaj kev pheej hmoo ntawm debonding los yog delamination.
4. Kev ncua sij hawm ncua sij hawm: Kev tuav dej siab tuaj yeem ua rau lub sijhawm teem sijhawm ntawm mortar, ncua sij hawm pib thiab zaum kawg ntawm cov khoom. Qhov kev ncua sij hawm no tuaj yeem cuam tshuam rau cov sijhawm tsim kho thiab ua rau muaj kev pheej hmoo ntawm mortar washout lossis hloov chaw thaum lub sijhawm teeb tsa.
5. Ua kom muaj kev puas tsuaj rau khov-thaw kev puas tsuaj: Kev tuav dej ntau dhau tuaj yeem ua rau muaj kev cuam tshuam ntawm cov cement mortar kom khov-thaw puas. Lub xub ntiag ntawm cov dej ntau dhau hauv cov tshuaj khib nyiab tuaj yeem ua rau muaj dej khov ntxiv thiab nthuav dav thaum lub voj voog khov, ua rau microcracking, spalling, thiab deterioration ntawm mortar.
6. Nyuaj hauv Kev Siv thiab Kev Siv: Cov mortar uas muaj dej ntau dhau tuaj yeem ua rau pom ntau dhau sagging, slumping, lossis ntws, ua rau nws nyuaj rau kev tswj thiab siv. Qhov no tuaj yeem ua rau kev ua haujlwm tsis zoo, cov pob zeb tsis sib xws, thiab kev cuam tshuam zoo nkauj hauv kev tsim kho masonry.

Thaum cov dej tuav yog tsim nyog los xyuas kom muaj kev ua haujlwm txaus thiab dej ntawm cov ntaub ntawv cementitious hauv cov khoom siv masonry, kev tuav dej ntau dhau tuaj yeem muaj kev cuam tshuam rau kev ua haujlwm, ua haujlwm ntev, thiab ua haujlwm ntawm cov khoom. Sib npaug dej tuav nrog lwm yam khoom tseem ceeb xws li lub zog, adhesion, teem sij hawm, thiab kev tiv thaiv ib puag ncig yog qhov tseem ceeb rau kev ua tiav qhov kev ua tau zoo thiab kev ua haujlwm ntev hauv kev tsim kho masonry.