Mmetụta nke Hydroxypropyl Methyl Cellulose Ether na Njirimara nke igwe fesa ciment Mortar

Cellulose ether bụ ihe mgbakwunye dị mkpa na ngwa ngwa igwe gbawara agbawa. A mụrụ mmetụta nke viscosities anọ dị iche iche nke hydroxypropyl methylcellulose (HPMC) na njide mmiri, njupụta, ọdịnaya ikuku, ihe eji arụ ọrụ na nkesa pore nke igwe gbawara ngwa ngwa. Nnyocha egosiwo na: HPMC nwere ike imeziwanye arụmọrụ njide mmiri nke ngwa agha, yana ọnụ ọgụgụ njide mmiri nwere ike gafere 90% mgbe ego HPMC bụ 0.15%. Nke kacha pụta ìhè; ọdịnaya ikuku nke ngwa agha na-abawanye na mmụba nke ọdịnaya HPMC: HPMC ga-ebelata ihe eji arụ ọrụ nke ngwa ngwa ciment, mana nha nke ngwa agha ga-abawanye; The pore size nke ngwa agha ga-abawanye budata mgbe agbakwunyere HPMC, The nkezi nke emerụ oghere na otutu emerụ oghere mụbara nke ukwuu.

Isi okwu: ngwa agha; hydroxypropyl methylcellulose ether; njide mmiri; nkesa nha pore

0. Okwu mmalite

N'ime afọ ndị na-adịbeghị anya, na ọganihu na-aga n'ihu nke ụlọ ọrụ na ọganihu nke nkà na ụzụ, site na ntinye na nkwalite nke igwe na-agbapụta ngwa agha ndị mba ọzọ, nkà na ụzụ nke ịgbasa ígwè na plasta na-emepụta nke ọma na mba anyị. Ngwa ngwa ịgbasa ígwè ọrụ dị iche na ngwa agha nkịtị, nke na-achọ ọrụ njigide mmiri dị elu, mmiri mmiri kwesịrị ekwesị na ụfọdụ arụmọrụ mgbochi. Ọtụtụ mgbe, a na-agbakwunye cellulose ether na ngwa agha, n'ime nke hydroxypropyl methylcellulose Plain ether (HPMC) bụ nke a na-ejikarị eme ihe. Ọrụ ndị bụ isi nke HPMC na ngwa agha bụ: ikike njigide mmiri dị mma, ịgbanye na viscosifying na ngbanwe rheological. Agbanyeghị, enweghị ike ileghara adịghị ike nke HPMC anya. HPMC nwere mmetụta ikuku-entraining, nke ga-eme ka ndị ọzọ n'ime ime ntụpọ ma na-akpa ike ibelata n'ibu Njirimara nke ngwa agha. Akwụkwọ a na-amụ mmetụta nke HPMC na ọnụego njide mmiri, njupụta, ikuku ikuku na ihe eji arụ ọrụ nke ngwa agha sitere na akụkụ macroscopic, na-amụkwa mmetụta nke HPMC na nhazi pore nke ngwa agha site na akụkụ microscopic.

1. Nwale

1.1 Akụrụngwa

Simenti: P·O42.5 ciment, 28d ike mgbanwe na mkpakọ bụ 6.9 na 48.2 MPa n'otu n'otu; ájá: Chengde mma osimiri ájá, 40-100 ntupu; cellulose ether: mmanya hydroxypropyl nke ụlọ ọrụ dị na Hebei Methyl cellulose ether mepụtara, ntụ ntụ ọcha, viscosity ọnụ 40, 100, 150, 200 Pa·S: Mmiri: mmiri mgbata dị ọcha.

1.2 Usoro ule

Dị ka JGJ/T 105-2011 si kwuo "Iwu Nrụpụta maka Mechanical Spraying and Plastering", nkwekọ nke ngwa agha ahụ bụ 80 ~ 120mm, na njigide mmiri dị elu karịa 90%. N'ime ule a, a na-edozi oke lime-aja na 1: 5, a na-achịkwa nkwụsi ike na (93).±2) mm, na ether cellulose na-ejikọta ya na mpụga, a na-agbakọkwa usoro ya dịka oke ciment si dị. A na-anwale ihe ndị bụ isi nke ngwa agha dị ka njupụta mmiri, ọdịnaya ikuku, ọnụego njigide mmiri, na nkwụsi ike site na JGJ 70-2009 "Ụzọ Nnwale maka Ngwongwo Basic of Building Mortar", na-anwale ma gbakọọ ọdịnaya ikuku dị ka usoro njupụta. A na-eme ule nkwadebe, mgbanwe ike na mkpakọ nke ihe nleba anya na GB/T 17671-1999 "Ụzọ maka ịnwale ike nke ciment Mortar Sand (ISO Method)". Ejiri mercury porosimetry nwale nha oghere ahụ. Ụdị nke mercury porosimeter bụ AUTOPORE 9500, na nha nha bụ 5.5 nm ruo 360.μm. Ngụkọta nke 4 set nke ule e mere. 0, 0.1%, 0.2%, 0.3% (ọnụọgụ bụ A, B, C, D).

2. Nsonaazụ na nyocha

2.1 Mmetụta nke HPMC na ọnụego njigide mmiri nke ngwa ngwa ciment

Njide mmiri na-ezo aka n'ikike nke ngwa agha ijide mmiri. N'ime igwe a na-efesa ngwa agha, ịgbakwụnye ether cellulose nwere ike ịnọgide na-enwe mmiri nke ọma, belata ọnụ ọgụgụ ọbara ọgbụgba, ma mezuo ihe achọrọ maka mmiri mmiri zuru oke nke ihe sitere na ciment.

Site na mmetụta nke HPMC na ọnụego njigide mmiri nke ngwa agha, enwere ike ịhụ na mmụba nke ọdịnaya HPMC, ọnụ ọgụgụ njide mmiri nke ngwa agha na-abawanye nwayọọ nwayọọ. Akụkụ nke cellulose ethers nwere viscosities nke 100, 150 na 200 Pa.·s bụ ihu ọma otu. Mgbe ọdịnaya dị 0.05% ruo 0.15%, ọnụ ọgụgụ njide mmiri na-abawanye n'ahịrị. Mgbe ọdịnaya dị 0.15%, ọnụ ọgụgụ njide mmiri dị elu karịa 93%..Mgbe 20% gasịrị, usoro na-arịwanye elu nke njide mmiri na-adị larịị, na-egosi na ọnụọgụ HPMC dị nso na saturation. Usoro mmetụta nke ọnụọgụ HPMC nwere viscosity nke 40 Pa·s na ọnụego njide mmiri bụ ihe dịka ahịrị kwụ ọtọ. Mgbe ego ahụ karịrị 0.15%, ọnụ ọgụgụ njide mmiri nke ngwa ngwa dị ntakịrị karịa nke ụdị HPMC atọ ndị ọzọ nwere otu viscosity. A na-ekwenyekarị na usoro ntinye mmiri nke cellulose ether bụ: ìgwè hydroxyl na cellulose ether molecule na oxygen atom na ether bond ga-ejikọta ya na molecule mmiri iji mepụta njikọ hydrogen, nke mere na mmiri efu na-aghọ mmiri agbụ. , si otú ahụ na-egwu mmetụta dị mma na-ejigide mmiri; A na-kweere na interdiffusion n'etiti mmiri ụmụ irighiri mmiri na cellulose ether molekul chains na-enye ohere mmiri molekul ịbanye n'ime ime nke cellulose ether macromolecular agbụ na-edo onwe ya n'okpuru ike njide ike, si otú na-emeziwanye mmiri njigide nke ciment slurry. Njide mmiri dị mma nwere ike ime ka ngwa agha ahụ dịrị n'otu, ọ dịghị mfe ikewapụ ya, ma nweta ọrụ ngwakọta dị mma, ebe ọ na-ebelata ihe eji arụ ọrụ ma na-abawanye ndụ nke igwe na-agba ngwa ngwa.

2.2 Mmetụta nke HPMC na njupụta na ikuku nke ngwa ngwa ciment

Site na mmetụta nke viscosities dị iche iche na dosages nke HPMC na njupụta nke ngwa agha, enwere ike ịhụ na mgbe usoro ọgwụgwọ HPMC bụ 0-0.20%, njupụta nke ngwa agha na-ebelata nke ukwuu na mmụba nke usoro ọgwụgwọ HPMC, site na 2050 kg / m.³ ihe dị ka 1650kg / m³ , belata ihe dịka 20%; mgbe ọdịnaya HPMC gafere 0.20%, mbelata njupụta na-adịkarị larịị. N'ịtụle ụdị anọ nke HPMC na viscosities dị iche iche, enwere ike ịhụ na viscosity dị elu, na-ebelata njupụta nke ngwa agha; na njupụta akụkụ nke ngwa agha na mbuaha viscosities nke 150 na 200 Pa s HPMC ihu ọma overlap, na-egosi na dị ka viscosity nke HPMC na-aga n'ihu na-abawanye, njupụta nke ngwa agha agaghịkwa ibelata.

Site mmetụta nke dị iche iche viscosities na dosages nke HPMC na ikuku ọdịnaya nke ngwa agha, ọ pụrụ ịhụ na mgbanwe nke ikuku ọdịnaya nke ngwa agha bụ megidere nke njupụta nke ngwa agha. Olu ikuku fọrọ nke nta ka ọ na-ebili n'ahịrị kwụ ọtọ; mgbe ọdịnaya HPMC gafere 0.20%, ikuku anaghị agbanwe agbanwe, na-egosi na mmetụta ikuku nke ngwa agha dị nso na saturation. Mmetụta ikuku-enraining nke HPMC na viscosity nke 150 na 200 Pa·s dị ukwuu karịa nke HPMC nwere viscosity nke 40 na 100 Pa·s.

Mmetụta ikuku nke cellulose ether na-ekpebi nke ọma site na nhazi ihe omimi ya. Cellulose ether nwere ma hydrophilic otu (hydroxyl, ether otu) na hydrophobic otu (methyl otu, glucose mgbanaka), na bụ surfactant. , nwere ọrụ elu, si otú a na-enwe mmetụta ikuku-entraning. N'otu aka ahụ, gas a na-ebute nwere ike ime dị ka bọmbụ na-ebu na ngwa agha, na-eme ka arụ ọrụ nke ngwa agha dịkwuo mma, na-amụba ụda olu, na-abawanye mmepụta, nke bara uru nye onye nrụpụta. Ma n'aka nke ọzọ, mmetụta na-eme ka ikuku na-eme ka ikuku nke ngwa ngwa na porosity dịkwuo elu mgbe ọ gbasịrị ike, na-ebute mmụba nke pores na-emerụ ahụ ma na-ebelata ihe ndị na-emepụta ihe. Ọ bụ ezie na HPMC nwere ụfọdụ mmetụta ntinye ikuku, ọ nweghị ike dochie onye na-eme ihe ikuku. Tụkwasị na nke ahụ, mgbe a na-eji HPMC na onye na-emepụta ihe na-emepụta ihe n'otu oge, onye na-eme ihe na-eme ka ikuku nwee ike ịda.

2.3 Mmetụta nke HPMC na ihe eji arụ ọrụ nke igwe ciment

Site na ike mgbanwe nke 28d na ike mkpakọ 28d, enwere ike ịhụ na mgbe ọnụọgụ HPMC bụ naanị 0.05%, ike nke ngwa agha na-ebelata nke ukwuu, nke dị ihe dị ka 25% dị ala karịa nke oghere oghere na-enweghị HPMC, na ike mkpakọ nwere ike ịbụ naanị ruru 65% nke nlele oghere. 80% Mgbe ọdịnaya nke HPMC karịrị 0.20%, ogo mbelata na ike mgbanwe na ike mkpakọ nke ngwa agha ahụ apụtaghị ìhè. The viscosity nke HPMC nwere obere mmetụta na n'ibu Njirimara nke ngwa agha. HPMC na-ewebata ọtụtụ obere afụ ikuku, na mmetụta na-akpali ikuku na ngwa agha ahụ na-abawanye porosity dị n'ime na pores na-emerụ ahụ nke ngwa agha ahụ, na-ebute mbelata dị ukwuu na ike mkpakọ na ike mgbanwe. Ihe ọzọ kpatara mbelata nke ngwa agha ike bụ mmetụta njide mmiri nke cellulose ether, nke na-eme ka mmiri dị na ngwa ngwa siri ike, na nnukwu mmiri na-ejikọta ọnụ na-eduga n'ibelata ike nke ngọngọ ule. N'ihi na n'ibu na-ewu ngwa agha, ọ bụ ezie na cellulose ether nwere ike budata iwelie mmiri njigide ọnụego nke ngwa agha na mma ya workability, ma ọ bụrụ na ego dị oke ibu, ọ ga-akpa ike na-emetụta n'ibu Njirimara nke ngwa agha, otú mmekọrịta dị n'etiti abụọ kwesịrị ịtụ ezi uche.

Site na nha mpịachi nke ụbọchị 28, enwere ike ịhụ na site na mmụba nke ọdịnaya HPMC, mkpokọta mpịachi nke ngwa agha ahụ na-egosi mmụba na-abawanye, nke bụ isi mmekọrịta. Nke a bụ n'ihi na cellulose ether agbakwunyere na-ewebata ọnụ ọgụgụ dị ukwuu nke ikuku ikuku, na-eme ka ntụpọ ndị ọzọ dị n'ime ngwa agha ahụ, na-eme ka mbelata dị elu na ike mkpakọ nke ngwa agha ahụ, na ọ bụ ezie na ike mgbanwe na-ebelata ruo n'ókè ụfọdụ; ma cellulose ether nwere ike imeziwanye mgbanwe nke ngwa agha ma na-eguzogide ike mpịachi dị mma, nke na-eme ka ọnụ ọgụgụ mbelata belata. N'ịtụle n'ụzọ zuru ezu, mmetụta jikọtara ọnụ nke abụọ ahụ na-ebute mmụba na oke mpịachi.

2.4 Mmetụta nke HPMC na nha pore nke ngwa agha

A tụrụ akụkụ nkesa nke pore nke otu anọ nke ihe nlele A, B, C na D site na intrusion porosimetry mercury.

Dabere na usoro nkesa nke pore, data nkesa pore na ụdị ọnụọgụ dị iche iche nke ihe atụ AD, HPMC nwere mmetụta dị ukwuu na nhazi nke ụrọ ciment:

(1) Mgbe ịgbakwunye HPMC, oghere simenti ngwa ngwa na-abawanye nke ukwuu. N'akụkụ nkesa nkesa pore, mpaghara ihe onyonyo a na-aga n'aka nri, ọnụ ahịa pore dabara na ọnụ ahịa kacha elu na-abawanye. Ọzọkwa site na data ndekọ ọnụ ọgụgụ nke pore size nkesa na median pore size na ule pụta dị iche iche statistical parameters, ọ pụrụ ịhụ na median pore size nke ciment ngwa agha mgbe agbakwunyere HPMC bụ budata ibu karịa nke oghere sample, na na sample na 0,3% onunu ogwu Aperture uru bụ 2 iwu nke ịdị ukwuu karịa nke oghere sample.

(2) Wu Zhongwei et al. kewara pores n'ime konkịtị n'ụdị anọ, nke na-adịghị emerụ ahụ.≤20 nm), obere pores na-emerụ ahụ (20-100 nm), pores na-emerụ ahụ (100-200 nm) na ọtụtụ pores na-emerụ ahụ (≥200 nm). 200 nm). Site na data nkesa nkesa nke pore na nsonaazụ nyocha nke ọnụọgụ ọnụọgụ dị iche iche, enwere ike ịhụ na ọnụ ọgụgụ nke pores na-adịghị emerụ ahụ ma ọ bụ obere pores na-emerụ emerụ na-ebelata nke ukwuu, na ọnụ ọgụgụ nke pores na-emerụ ahụ ma ọ bụ karịa pores na-abawanye mgbe agbakwunyere HPMC. Oghere ndị na-adịghị emerụ ahụ ma ọ bụ nke na-adịghị emerụ ahụ nke ihe nlele na-enweghị HPMC bụ ihe dịka 49.4%, na pores ndị na-adịghị emerụ ahụ ma ọ bụ ndị na-adịghị emerụ ahụ na-ebelata nke ukwuu mgbe agbakwunyere HPMC. Na-ewere usoro onunu ogwu nke 0.1% dịka ọmụmaatụ, pores na-adịghị emerụ ahụ ma ọ bụ nke na-adịghị emerụ ahụ na-ebelata ihe dịka 45%. , ọnụ ọgụgụ nke pores na-emerụ ahụ karịrị 10μm mụbara ihe dị ka ugboro 9.

3) The median pore dayameta, nkezi pore dayameta, kpọmkwem pore olu na kpọmkwem n'elu ebe adịghị agbaso a nnọọ nlezianya mgbanwe iwu na-abawanye nke HPMC ọdịnaya, nke nwere ike metụtara na nnukwu dispersion nke sample nhọrọ na mercury injection ule. Mana n'ozuzu ya, dayameta pore nke etiti, nkezi pore dayameta na oke pore nke ihe nlele jikọtara ya na HPMC na-abawanye ma e jiri ya tụnyere oghere oghere, ebe mpaghara elu ahụ akọwapụtara na-ebelata.

3. Nkwubi okwu

(1) Ọnụ ọgụgụ njide mmiri nke ngwa agha na-abawanye na mmụba nke ọdịnaya HPMC. Akụkụ nke cellulose ether nwere viscosities nke 100, 150 na 200 Pa.·S bụ otu ihe ahụ, na njide mmiri dị elu karịa 93% mgbe ọdịnaya dị 0.15%. Mgbe ọdịnaya nke 40 Pa·s cellulose ether karịrị 0.15%, mmiri njide ọnụego dị ala karịa nke ụdị atọ ọzọ nke viscosity HPMC.

(2) Njupụta nke ngwa agha na-ebelata nke nta nke nta site na mmụba nke ọdịnaya HPMC, ọdịnaya ya bụ 0.05%. Mbelata njupụta bụ nke kacha pụta ìhè na 0.20%, ihe dịka 20%; mgbe ọdịnaya karịrị 0.20%, njupụta ahụ adịghị agbanwe agbanwe; ọdịnaya ikuku nke ngwa agha na-abawanye na mmụba nke ọdịnaya HPMC.

(3) Mmụba nke ọdịnaya HPMC ga-ebelata ihe eji arụ ọrụ nke ngwa ngwa ciment, mana nha nha nke ngwa agha ga-abawanye, mgbanwe nke ngwa agha ga-aka mma.

(4) Mgbe agbakwunyere HPMC, nha pore nke ngwa agha na-abawanye nke ukwuu, na oke nke pores na-emerụ ahụ na ọtụtụ pores na-emerụ ahụ na-abawanye nke ukwuu. Ihe nlele nke nwere 0.1% HPMC ọdịnaya belatara ihe dị ka 45% ma e jiri ya tụnyere oghere oghere na-enweghị pores na-emerụ emerụ ma ọ bụ ọnụ ọgụgụ nke pores na-emerụ ahụ karịa 10.μm mụbara ihe dị ka ugboro 9.