Cov haujlwm tshwj xeeb ntawm kev ntxiv tus neeg sawv cev nthuav dav hauv pob zeb

Cov haujlwm tshwj xeeb ntawm kev ntxiv tus neeg sawv cev nthuav dav hauv pob zeb

Concrete expansion agent yog siv los npaj expansive qhob (xws li compensating shrinkage qhob thiab self-stressing qhob). Ntawm qhov tod tes, feem ntau siv sijhawm yog qhov kev npaj ntawm qib high-qib waterproof pob zeb thiab qhov tsim nyog txuas ntxiv ntawm kev sib koom ua ke los yog tom qab siv txoj hlua khi.

Concrete expansion agent yog calcium sulfoaluminate hom qhob expansion tus neeg sawv cev, tsis muaj sodium ntsev, thiab yuav tsum tsis txhob ua rau pob zeb alkali-tag nrho cov tshuaj tiv thaiv. Lub durability yog qhov zoo, kev nthuav dav kev ua tau zoo yog ruaj khov, thiab lub zog tseem nce ntxiv. Ordinary qhob feem ntau leaks vim shrinkage cracking, txo nws cov kev siv thiab durability.

Ntxiv 8 feem pua ​​-12 feem pua ​​​​tus neeg sawv cev nthuav dav hauv cov cement tuaj yeem sib xyaw rau hauv kev them nyiaj shrinkage pob zeb, uas zoo heev txhim kho qhov tawg tsis kam thiab tsis muaj peev xwm ntawm cov pob zeb.

Kev khiav dej num sab nraud tuaj yeem raug tshem tawm, thiab qhov sib nrug ntawm cov pob qij txha tom qab sib tov tuaj yeem txuas ntxiv los tiv thaiv qhov tshwm sim ntawm qhov kub thiab txias sib txawv ntawm cov pob zeb loj thiab cov pob zeb muaj zog.

Cov kev ceev faj:

1. Lub chaw npaj sib tov lossis qhov chaw sib tov yuav tsum tau pub raws li qhov kev txiav txim siab ntawm kev them nyiaj shrinkage pob zeb. Cov cuab yeej ntsuas ntsuas yuav tsum yog qhov tseeb. tsim kom muaj kev puas tsuaj.

2. Lub sijhawm sib xyaw ntawm cov pob zeb sib xyaw nrog tus neeg sawv cev nthuav dav yog 30 vib nas this ntev dua li cov pob zeb zoo tib yam. Qhov kub ntawm cov pob zeb yuav tsum qis dua 30 degree. Lub caij nplooj zeeg dawb ntawm cov pob zeb yuav tsum tau tswj tsis pub dhau 2 meters, thiab kev co yuav tsum tsis sib xws, ntom thiab tsis to. , tsis tshua muaj kev vibration, tab sis kev co.

3. Ua ntej qhov kev teeb tsa zaum kawg ntawm cov pob zeb sib xyaw nrog cov khoom siv no, kev saib xyuas yuav tsum tau them rau cov plastering thib ob txhawm rau tiv thaiv qhov tshwm sim ntawm qhov chaw sib tsoo.

4. Kev saib xyuas ntawm cov pob zeb sib xyaw nrog tus neeg sawv cev nthuav dav tom qab nchuav yog qhov tseem ceeb heev. Nws yuav tsum tau watered thiab khaws cia nyob rau hauv lub sij hawm raws li qhov kub thiab txias, yog li ntawd qhov tshwm sim ntawm cov pob zeb yuav tsum tau khaws cia noo noo, thiab lub sij hawm kho yuav tsum tsis txhob tsawg tshaj li 7 hnub; Kev tsim kho kub tsis zoo yuav tsum xyuas kom meej tias qhov kub ntawm cov pob zeb nkag mus rau hauv pwm yog siab dua 5 degree, tam sim ntawd tom qab nchuav, siv cov yas zaj duab xis thiab cov khoom siv thermal rwb thaiv tsev rau thermal rwb thaiv tsev thiab kev tu kom zoo;

5. Tom qab cov pob zeb sib xyaw nrog cov khoom no yog nchuav, hauv qab daus yuav tsum tau rov qab nrog cov txiv qaub av kom sai li sai tau, thiab lub ru tsev yuav tsum tau siv los ua cov txheej txheem dej tsis zoo thiab cov txheej txheem thermal rwb thaiv tsev kom sai li sai tau.

Siv: Baidu Encyclopedia - Concrete Expansion Agent Concrete expansion agent yog ib qho qis-alkali, low-volume high-performance concrete expansion agent, thiab nws belongs rau calcium sulfoaluminate qhob expansion agent. Txoj kev loj hlob ntawm nws txoj kev nthuav dav muaj feem xyuam rau cov cement tom qab hloov dua siab tshiab Lub hydration system yog ntau tshaj. Ntxiv 8-10 feem pua ​​​​ntawm cov cement expansion tus neeg sawv cev rau cov pob zeb tuaj yeem them nyiaj rau qhov shrinkage ntawm cov pob zeb, txhim kho kev tiv thaiv kev sib tsoo thiab kev tawm tsam ntawm cov pob zeb, thiab ua kom nws ua kom tsis muaj dej tsis zoo thiab tsis muaj dej tsis zoo nrog kev ua haujlwm zoo.

Qhob ntxiv tus neeg sawv cev nthuav dav yog siv los npaj cov pob zeb nthuav dav (xws li kev them nyiaj shrinkage pob zeb thiab nws tus kheej-stressing pob zeb). Nyob rau hauv ob qho tib si, feem ntau siv sij hawm yog los npaj high-qib waterproof pob zeb thiab tsim nyog ncua qhov sib nrug ntawm expansion pob qij txha los yog post-casting siv.

Concrete expansion agents muab faib ua peb pawg. Calcium sulfoaluminate qhob expansion tus neeg sawv cev yog hais txog cov pob zeb nthuav dav uas tsim cov ettringite los ntawm cov tshuaj tiv thaiv dej tom qab sib xyaw nrog cov cement thiab dej. Calcium sulfoaluminate-calcium oxide qhob expansion tus neeg saib xyuas yog hais txog kev nthuav dav tus neeg sawv cev uas tsim cov ettringite thiab calcium hydroxide tom qab hydration cov tshuaj tiv thaiv tom qab sib tov nrog cov cement thiab dej, thiab calcium oxide qhob expansion agent.

cov ntaub ntawv txuas ntxiv;

Concrete expansion tus neeg sawv cev yog cov khoom siv zoo tshaj plaws rau kev them nyiaj shrinkage, thiab kom qhuav shrinkage thiab kub sib txawv shrinkage yog lub ntsiab yog vim li cas. Thaum nws ntxiv rau pob zeb, ntau qhov nthuav dav crystalline hydrate yog tsim tom qab sib xyaw nrog dej, uas ua rau nws nthuav dav. Raws li kev txwv ntawm steel tuav thiab cov haujlwm nyob ib sab, lub zog nthuav dav tuaj yeem hloov mus rau hauv kev nyuaj siab, uas tuaj yeem cuam tshuam qhov hardening ntawm pob zeb. shrinkage tensile kev nyuaj siab, yog li txo cov kab nrib pleb.

Lub impermeable tus neeg sawv cev yog tsuas yog los txhim kho nws tus kheej compaction thiab dej li kom tau raws li nws impermeability thiab impermeability. Txawm li cas los xij, vim qhov shrinkage ntawm cov pob zeb, qhov kev ntxhov siab tshwm sim los ntawm qhov shrinkage yog txaus los deform cov qauv thiab txawm tawg. Vim yog tawg, pob zeb tsis muaj dej tsis muaj kab ntau ntawm kev tiv thaiv. Qhov no yog qhov laj thawj tseem ceeb ntawm kev xau hauv tsev.

Cov khoom siv crystalline ua rau lub qhov hws tsis tu ncua, txhawb nqa lub compactness ntawm cov pob zeb, thiab txhim kho cov kev tawm tsam, acid, alkali, tshuaj yaig kuj thiab micro-expansion peev xwm ntawm cov pob zeb.

Qhov chaw siv; Sogou Encyclopedia--Concrete Expansion Agent Tom qab cov pob zeb tau ntxiv nrog tus neeg sawv cev nthuav dav, tus neeg sawv cev nthuav dav yuav hnov ​​​​mob nrog calcium hydroxide nyob rau hauv cov pob zeb los ua ettringite crystal particles, uas yuav ua rau cov pob zeb nthuav dav me ntsis thiab tsim kom muaj lub zog siab. . Lub siab no tuaj yeem cuam tshuam qhov kev ntxhov siab tensile uas tsim los ntawm cov pob zeb thaum lub sij hawm teeb tsa thiab cov txheej txheem hardening, txo qhov tshwm sim ntawm cov kab nrib pleb. Kev sib xyaw 1.5 feem pua ​​-2 feem pua ​​​​tus neeg sawv cev nthuav dav hauv cov cement tuaj yeem sib xyaw rau hauv kev them nyiaj shrinkage pob zeb, uas zoo heev txhim kho qhov tawg tsis kam thiab tsis muaj peev xwm ntawm cov pob zeb ua vaj tse.

Kev khiav dej num sab nraud tuaj yeem raug tshem tawm, thiab qhov sib nrug ntawm cov pob qij txha tom qab sib tov tuaj yeem txuas ntxiv los tiv thaiv qhov tshwm sim ntawm qhov kub thiab txias sib txawv ntawm cov pob zeb loj thiab cov pob zeb muaj zog. Cov pob zeb yuav ntsws thaum lub sijhawm teeb tsa. Yog tias nws yog ib qho kev sib xyaw ua ke ntawm cov nqaj thiab slab (hauv qab phaj), feem ntau tsis tas yuav ntxiv tus neeg sawv cev nthuav dav. Cov kab nrib pleb tshwm sim ntawm kev tsim cov pob qij txha, yog li yuav tsum tau ntxiv tus neeg sawv cev nthuav dav ntxiv. Ib qho yooj yim cov ntsiab lus yog tawg tsis kam thiab waterproofing