Focus on Cellulose ethers

Iimpawu eziphambili zodaka lweDrymix

I-Drymix Mortar yeyona nto isetyenziswa kakhulu kwaye yenye yezona zinto zibalulekileyo kubunjineli bokwakha bale mihla. Yenziwe ngesamente, isanti kunye nemixube. Isamente yeyona nto iphambili kwisamente. Namhlanje makhe sifunde ngakumbi malunga neempawu ezisisiseko ze-drymix mortar.

Udaka lokwakha: Yimathiriyeli yokwakha elungiselelwe nge-cementing material, i-aggregate efanelekileyo, i-admixture kunye namanzi ngokufanelekileyo.

Udaka lwamatye: Udaka olubophelela izitena, amatye, iibhloko, njl.njl kwi-masonry kuthiwa yi-masonry mortar. Udaka lweMasonry ludlala indima yeebhloko zesamente kunye nokuhambisa umthwalo, kwaye yinxalenye ebalulekileyo yobume.

1. Izinto zokuqulunqa udaka lwe-masonry mortar

(1) Izinto zesamente kunye nomxube

Izinto zesamente ezidla ngokusetyenziswa kudaka lwemasonry ziquka isamente, intlama yekalika, kunye negypsum yokwakha.

Umgangatho wamandla wesamente osetyenziselwa udaka lwe-masonry kufuneka ukhethwe ngokweemfuno zokuyila. Umgangatho wamandla wesamente osetyenziswe kudaka lwesamente akufanele ube mkhulu kune-32.5; umgangatho wamandla wesamente osetyenziswe kwi-samente exutywe nodaka akufanele ube mkhulu kune-42.5.

Ukuze kuphuculwe ukusebenza kodaka kunye nokunciphisa ubungakanani besamente, enye intlama yekalika, intlama yodongwe okanye uthuthu lwempukane idla ngokuxutywa kudaka lwesamente, kwaye udaka olulungiswe ngolu hlobo lubizwa ngokuba ngudaka oluxutyiweyo lwesamente. Ezi zixhobo akufanele ziqulethe izinto ezinobungozi ezichaphazela ukusebenza kodaka, kwaye xa zineengqungquthela okanye i-agglomerates, kufuneka zihluzwe nge-3 mm ye-square hole sieve. I-slaked lime powder ayinakusetyenziswa ngokuthe ngqo kwi-masonry mortar.

(2) Isishwankathelo esihle

Isanti esetyenziselwa udaka lwemasonry kufuneka ibe yintlabathi ephakathi, kwaye i-rubble masonry kufuneka ibe yintlabathi erhabaxa. Isiqulatho sodaka esantini akufunekanga sibe ngaphezu kwe-5%. Ngodaka oluxutywe nge-samente kunye nebakala lamandla e-M2.5, umxholo wodaka wesanti akufanele udlule i-10%.

(3) Iimfuno zezongezo

Njengokongezwa kwe-admixtures kwikhonkrithi, ukwenzela ukuba kuphuculwe iipropati ezithile zodaka, i-admixtures efana neplastiki, amandla okuqala,i-cellulose ether, iantifreeze, kunye ne-retading nazo zinokongezwa. Ngokubanzi, imixube ye-inorganic kufuneka isetyenziswe, kwaye iintlobo zazo kunye needosi kufuneka zimiselwe ngokuvavanywa.

(4) Iimfuneko zamanzi odaka ziyafana nezo zekhonkrithi.

2. Iimpawu zobuchwephesha bomxube we-masonry mortar

(1) Ukumanzi kodaka

Ukusebenza kodaka oluqukuqela phantsi kobunzima balo okanye amandla angaphandle kubizwa ngokuba yi-fluidity of mortar, ebizwa ngokuba yi-consistency. Isalathiso esibonisa ubumanzi bomdaka yinqanaba lokutshona, elilinganiswa nemitha yokuguquguquka kodaka, kwaye iyunithi yalo mm. Ukukhethwa kokuhambelana kodaka kwiprojekthi kusekelwe kuhlobo lweemeko zemozulu kunye nokwakhiwa kwemozulu, enokuthi ikhethwe ngokubhekisela kwiThebhile 5-1 ("iKhowudi yoKwakha kunye noKwamkeleka koBunjineli beMasonry" (GB51203-1998)).

Izinto ezichaphazela i-fluidity of mortar zezi: ukusetyenziswa kwamanzi omdaka, uhlobo kunye nobungakanani bezinto ze-cementitious, i-particle shape kunye ne-gradation of aggregate, uhlobo kunye ne-dosage ye-admixture, ukufana kokuxuba, njl.

(2) Ukugcinwa kwamanzi kodaka

Ngexesha lokuthutha, ukupaka kunye nokusetyenziswa kodaka oluxubileyo, kuthintela ukuhlukana phakathi kwamanzi kunye nezinto eziqinileyo, phakathi kwe-slurry ecocekileyo kunye ne-aggregate, kunye nokukwazi ukugcina amanzi kukugcinwa kwamanzi omdaka. Ukongeza inani elifanelekileyo le-microfoam okanye i-plasticizer inokuphucula kakhulu ukugcinwa kwamanzi kunye nokumanzi kodaka. Ugcino lwamanzi lodaka lulinganiswa ngemitha yodaka lwe-delamination, kwaye lubonakaliswa nge-delamination (. Ukuba i-delamination inkulu kakhulu, oko kuthetha ukuba udaka luqhelene nokudilizwa kunye nokwahlulahlula, nto leyo engabangeli ukwakhiwa kunye nokuqina kwesamente. idigri ye-delamination yodaka lwemasonry akufunekanga ibe nkulu kune-3 0mm Ukuba i-delamination incinci kakhulu, iintanda zokomisa zinokwenzeka, ngoko ke ukuchithwa kodaka akufanele kube ngaphantsi kwe-10mm.

(3) Ukumisela ixesha

Ixesha lokumisela lodaka lokwakha liya kuvavanywa ngokusekelwe kuxhathiso lokungena olufikelela kwi-0.5MPa. Umdaka we-samente akufanele udlule iiyure ze-8, kwaye i-samente edibeneyo yodaka akufanele idlule iiyure ezili-10. Emva kokongeza i-admixture, kufuneka ihlangabezane neemfuno zoyilo kunye nokwakhiwa.

3. Iimpawu zobuchwephesha bodaka lwe-masonry emva kokuqina

Amandla oxinzelelo lodaka asetyenziswa njengesalathiso saso samandla. Ubungakanani bomzekelo obuqhelekileyo bungama-70.7 mm cubic specimens, iqela leesampuli ezi-6, kunye nenkcubeko eqhelekileyo ukuya kwiintsuku ezingama-28, kwaye amandla oxinzelelo oluphakathi (MPa) alinganiswa. I-Masonry mortar ihlulwe ibe ngamabakala amathandathu amandla ngokwamandla oxinzelelo: M20, M15, M7.5, M5.0, kunye ne-M2.5. Amandla omdaka akachaphazeli nje kuphela ukubunjwa kunye nomlinganiselo wodaka ngokwawo, kodwa unxulumene nokusebenza kwamanzi kwisiseko.

Ngodaka lwesamente, le fomula yamandla ilandelayo ingasetyenziselwa ukuqikelela:

(1) Isiseko esingafunxwanga (njengelitye elishinyeneyo)

Isiseko esingaxutywanga sisona sizathu siphambili esichaphazela amandla omdaka, ngokusisiseko afana nekhonkrithi, oko kukuthi, ubukhulu becala bunqunywe ngamandla e-samente kunye nomlinganiselo wamanzi-samente.

(2) Isiseko sokufunxa amanzi (njengezitena zodongwe kunye nezinye izinto ezibunjiweyo)

Oku kungenxa yokuba umaleko wesiseko unokufunxa amanzi. Xa ifunxa amanzi, ubungakanani bamanzi agcinwe eludaka luxhomekeke kugcino lwawo lwamanzi, kwaye alunanto yakwenza nomlinganiselo wesamente yamanzi. Ngoko ke, amandla omdaka ngeli xesha agqitywa ngamandla e-samente kunye nomthamo wesamente.

Ukuqina kwebhondi yodaka lwemasonry

Udaka lwemasonry kufuneka lube namandla awoneleyo adibeneyo ukuze idibanise i-masonry ibe yinto eyomeleleyo. Ubungakanani bamandla obumbeneyo bodaka buya kuchaphazela amandla e-shear, ukuqina, ukuzinza kunye nokuxhatshazwa kwe-vibration ye-masonry. Ngokuqhelekileyo, amandla okubambisana ayanda ngokunyuka kwamandla oxinzelelo lodaka. Ukudityaniswa kodaka kukwanxulumene nobume bomphezulu, iqondo lokumanzisa kunye neemeko zokunyanga zemathiriyeli yobume.


Ixesha lokuposa: Dec-07-2022
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