Cellulose ether pane slag sand mortar

Kushandisa P·II 52.5 giredhi simende sesimende zvinhu uye simbi slag jecha seyakakwana aggregate, iyo simbi slag jecha ine yakakwira fluidity uye yakakwirira simba inogadzirwa nekuwedzera makemikari ekuwedzera akadai semvura inoderedza, latex poda uye defoamer Special dhaka, uye mhedzisiro yezviviri zvakasiyana. viscosities (2000mPa·s uye 6000mPa·s) yehydroxypropyl methylcellulose ether (HPMC) pakuchengetedza kwayo mvura, fluidity uye simba zvakadzidzwa. Zvigumisiro zvinoratidza kuti: (1) Zvose HPMC2000 uye HPMC6000 zvinogona kuwedzera zvakanyanya kuwanda kwekuchengetwa kwemvura yedhaka ichangobva kusanganiswa uye kuvandudza kushanda kwayo kwekuchengetedza mvura; (2) Kana zviri mukati me cellulose ether zvakaderera, mhedzisiro yekuyerera kwedhaka haisi pachena. Kana ichinge yawedzerwa kusvika ku0.25% kana pamusoro, ine kumwe kushatisa mhedzisiro pakuyerera kwedhaka, pakati peiyo iyo kuparara kweHPMC6000 kunonyanya kuoneka; (3) kuwedzera kwe cellulose ether haina mhedzisiro yakajeka pamazuva makumi maviri nemasere ekumanikidza kwedhaka, asi kuwedzerwa kweHPMC2000 Nguva isina kufanira, zviri pachena kuti haina kunaka kune simba rekuchinjika kwemazera akasiyana, uye panguva imwechete inoderedza zvakanyanya. kutanga (mazuva matatu nemazuva manomwe) kudzvinyirira simba rematope; (4) Kuwedzerwa kweHPMC6000 kune imwe mhedzisiro pane flexural simba remazera akasiyana, asi kudzikiswa kwacho kwakadzikira zvakanyanya kupfuura kweHPMC2000. Mupepa rino, zvinofungidzirwa kuti HPMC6000 inofanira kusarudzwa pakugadzirira simbi slag jecha yakakosha dhaka ine yakakwira fluidity, yakakwira mvura yekuchengeta mwero uye simba rakawanda, uye chipimo chemushonga hachifanire kunge chakakura kupfuura 0.20%.

Mazwi akakosha:simbi slag jecha; cellulose ether; viscosity; kushanda kushanda; simba

sumo

Steel slag ndeye-chigadzirwa chekugadzirwa kwesimbi. Nekuvandudzwa kweindasitiri yesimbi nesimbi, kubudiswa kwegore negore kwesimbi slag kwakawedzera nematani mamiriyoni zana mumakore achangopfuura, uye dambudziko rekuchengetedza nekuda kwekukundikana kwekushandisa zviwanikwa panguva yakanyanyisa. Naizvozvo, kushandisa zviwanikwa uye kuraswa kwesimbi slag kuburikidza nesainzi uye inoshanda nzira idambudziko risingagoni kufuratirwa. Simbi slag ine hunhu hwehupamhi hwepamusoro, kuomarara kusimba uye yakakwirira yekumanikidza simba, uye inogona kushandiswa sechinzvimbo chejecha rechisikigo mumatope esimende kana kongiri. Simbi slag zvakare ine imwe reactivity. Steel slag inogayiwa kuita imwe fineness powder (simbi slag poda). Mushure mekusanganiswa mukongiri, inogona kuita pozzolanic mhedzisiro, iyo inobatsira kukwidziridza kusimba kweiyo slurry uye kugadzirisa iyo interface shanduko pakati pekongiri aggregate uye slurry. nzvimbo, nokudaro kuwedzera simba rekrete. Nekudaro, zvinofanirwa kutariswa kune iyo simbi slag yakaburitswa pasina chero matanho, yayo yemukati yemahara calcium oxide, yemahara magnesium oxide uye RO chikamu chinokonzeresa kugadzikana kwehuwandu hwesimbi slag, iyo inonyanya kumisa kushandiswa kwesimbi slag seyakaomarara uye. fine aggregates. Kushandiswa mudhaka resimende kana kongiri. Wang Yuji et al. muchidimbu akasiyana simbi slag kurapwa maitiro uye akawana kuti simbi slag inobatwa inopisa stuffing nzira ine kugadzikana kwakanaka uye inogona kubvisa dambudziko rayo rekuwedzera mune simende kongiri, uye kupisa kwakapfava kurapwa maitiro akaitwa muShanghai No. 3 Iron uye Steel Plant ye kekutanga. Mukuwedzera kune dambudziko rekugadzikana, simbi slag aggregates inewo maitiro ehukashama pores, akawanda-angles, uye shoma shoma ye hydration zvigadzirwa pamusoro. Kana ichishandiswa seaggregates kugadzira dhaka nekongiri, kushanda kwavo kunowanzo kukanganiswa. Parizvino, pasi pemamiriro ekuvimbisa kugadzikana kwevhoriyamu, kushandisa simbi slag seyakakwana aggregate kugadzirira yakakosha dhaka igwara rakakosha rekushandisa zviwanikwa zvesimbi slag. Chidzidzo chacho chakawana kuti kuwedzera mvura inoderedza, latex powder, cellulose ether, air-entraining agent uye defoamer kune simbi slag jecha dhaka inogona kuvandudza kushanda kwemusanganiswa uye kushanda kwakaoma kwesimbi slag jecha sezvinodiwa. Munyori akashandisa zviyero zvekuwedzera latex powder uye zvimwe zvakasanganiswa kugadzirira simbi slag jecha yakakwirira-simba rekugadzirisa dhaka. Mukugadzira uye kushandiswa kwedhaka, cellulose ether ndiyo inonyanya kushandiswa kwemakemikari musanganiswa. Anonyanya kushandiswa cellulose ether mudhaka ndeye hydroxypropyl methyl cellulose ether (HPMC) uye hydroxyethyl methyl cellulose ether (HEMC). )Mirira. Cellulose ether inogona kuvandudza kushanda kwedhaka kusvika pamwero mukuru, sekupa dhaka rakanakisa rekuchengetedza mvura kuburikidza nekukora, asi kuwedzera cellulose ether kuchakanganisawo fluidity, mhepo yemukati, kuseta nguva uye kuoma kwedhaka. Various properties.

Kuitira kutungamira zvirinani kusimudzira uye kushandiswa kwesimbi slag jecha dhaka, pahwaro hwekare tsvakurudzo basa pasimbi slag jecha dhaka, bepa iri rinoshandisa maviri marudzi viscosities (2000mPa.·s uye 6000mPa·s) yehydroxypropyl methyl cellulose ether (HPMC) Ita tsvakurudzo yekuedza pamusoro pesimba resimbi slag jecha rakasimba-simba pakushanda kwekushanda (fluidity uye kuchengetedza mvura) uye kudzvinyirira uye kushanduka kwesimba.

1. Chikamu chekuedza

1.1 Raw zvinhu

Simende: Onoda P·II 52.5 giredhi simende.

Simbi slag jecha: Iyo inoshandura simbi slag inogadzirwa neShanghai Baosteel inogadziriswa nekupisa kurongedza maitiro, ine huzhinji density ye1910kg/m.³, yejecha repakati, uye fineness modulus ye2.3.

Mvura inoderedza: polycarboxylate mvura inoderedza (PC) inogadzirwa neShanghai Gaotie Chemical Co., Ltd., mufomu yehupfu.

Latex poda: Model 5010N yakapihwa neWacker Chemicals (China) Co., Ltd.

Defoamer: Code P803 chigadzirwa chakapihwa neGerman Mingling Chemical Group, hupfu, density 340kg/m³, grey scale 34% (800°C), pH kukosha 7.2 (20°C DIN ISO 976, 1% IN DIST, mvura).

Cellulose ether: hydroxypropyl methylcellulose ether inopiwa naIyo kambani Kima Chemical Co., Ltd., iyo ine viscosity ye2000mPa·s yakasarudzwa seHPMC2000, uye iyo ine viscosity ye6000mPa.·s yakasarudzwa seHPMC6000.

Kusanganisa mvura: pombi mvura.

1.2 Chiyedzo chechiyero

Simende-jecha reshiyo yesimbi slag-jecha dhaka rakagadzirirwa mukutanga nhanho yebvunzo yaive 1: 3 (huwandu hwehuwandu), iyo mvura-simende reshiyo yaive 0.50 (huru chiyero), uye dosage yepolycarboxylate superplasticizer yaive 0.25% (sement mass percentage, yakafanana pazasi.), the latex powder content is 2.0%, uye defoamer content is 0.08%. Pakuedza kwekuenzanisa, madosi eethers maviri cellulose ether HPMC2000 uye HPMC6000 aive 0.15%, 0.20%, 0.25% uye 0.30%, zvichiteerana.

1.3 Nzira yekuedza

Mortar Fluidity Test Method: gadzira dhaka zvinoenderana neGB/T 17671-1999 "Cement Mortar Strength Test (ISO Method)", shandisa test mold muGB/T2419-2005 "Cement Mortar Fluidity Test Method", uye simbisa Dururira dhaka rakanaka. muyedzo yekuumbwa nekukasira, pukuta dhaka rakawandisa ne scraper, simudza bvunzo mold yakatarisa kumusoro, uye kana dhaka risingachayerera, yera hupamhi hwekupararira kwenzvimbo yedhaka uye dhayamita munzira yakatwasuka, uye tora avhareji kukosha, chigumisiro chakarurama kusvika 5mm.

Kuedzwa kwechiyero chekuchengetedza mvura kwedhaka kunoitwa maererano nenzira inotsanangurwa muJGJ/T 70-2009 "Test Methods for Basic Properties of Building Mortar".

Muedzo wesimba rekumanikidza uye flexural simba redhaka rinoitwa zvinoenderana nenzira yakatsanangurwa muGB/T 17671-1999, uye mazera ebvunzo mazuva matatu, 7 mazuva uye 28 mazuva zvichiteerana.

2. Migumisiro uye nhaurirano

2.1 Mhedzisiro ye cellulose ether pakushanda kushanda kwesimbi slag sand mortar

Kubva pamhedzisiro yezvakasiyana zvemukati cellulose ether pakuchengetedza mvura kwesimbi slag jecha dhaka, zvinogona kuoneka kuti kuwedzera HPMC2000 kana HPMC6000 kunogona kuvandudza zvakanyanya kuchengetwa kwemvura kwedhaka richangobva kusanganiswa. Nekuwedzera kwemukati we cellulose ether, chiyero chekuchengetedza mvura yedhaka chakawedzera zvakanyanya uye chakaramba chakadzikama. Pakati pavo, apo zvinyorwa zve cellulose ether zvinongova 0.15%, chiyero chekuchengetedza mvura yedhaka chinowedzerwa neanenge 10% kana ichienzaniswa neyo pasina kuwedzera, inosvika 96%; apo zvinyorwa zvinowedzera kusvika ku 0.30%, chiyero chekuchengetedza mvura yedhaka chakakwirira kusvika 98.5%. Zvinogona kuonekwa kuti kuwedzerwa kwe cellulose ether kunogona kuvandudza zvakanyanya kuchengetwa kwemvura kwedhaka.

Kubva pakuita kwemaitiro akasiyana-siyana e-cellulose ether pane fluidity yesimbi slag jecha dhaka, zvinogona kuonekwa kuti kana chiyero che cellulose ether chiri 0.15% uye 0.20%, haina mhedzisiro yakajeka pakuyerera kwedhaka; kana dosi richiwedzera kusvika 0.25% kana pamusoro, rine simba guru pamvura, asi fluidity inogona kuramba ichichengetwa pa260mm uye pamusoro; kana macellulose ethers maviri ari muhuwandu hwakafanana, zvichienzaniswa neHPMC2000, kukanganisa kweHPMC6000 pamatope emvura kunonyanya kuoneka.

Hydroxypropyl methyl cellulose ether isiri-ionic polymer ine mvura inochengetedza zvakanaka, uye mukati meimwe siyana, iyo yakakura viscosity, zviri nani kuchengetwa kwemvura uye zvakanyanya kuoneka kukora mhedzisiro. Chikonzero ndechekuti boka rehydroxyl riri pacheni yaro yemamorekuru uye atomu yeokisijeni paether bond inogona kuumba hydrogen zvisungo nemamorekuru emvura, zvichiita kuti mvura yemahara iite mvura yakasungwa. Naizvozvo, pachiyero chimwe chete, HPMC6000 inogona kuwedzera viscosity yedhaka kupfuura HPMC2000, kuderedza fluidity yedhaka, uye kuwedzera mwero wekuchengetedza mvura zviri pachena. Gwaro 10 rinotsanangura chiitiko chiri pamusoro nekugadzira mhinduro ye viscoelastic mushure mekunge cellulose ether yanyungudutswa mumvura, uye kuratidza kuyerera kwemaitiro ne deformation. Inogona kufananidzwa kuti simbi slag mortar yakagadzirirwa mupepa iyi ine mvura yakawanda, iyo inogona kusvika 295mm pasina kusanganiswa, uye deformation yayo yakakura. Kana cellulose ether ichiwedzerwa, iyo slurry ichaita viscous kuyerera, uye kugona kwayo kudzoreredza chimiro kudiki, saka inotungamira mukuderera kwekufamba.

2.2 Mhedzisiro ye cellulose ether pakusimba kwesimbi slag jecha dhaka

Kuwedzerwa kwe cellulose ether hakusi kungokanganisa kushanda kwesimbi slag sand mortar, asiwo kunokanganisa maitiro ayo emagetsi.

Kubva pakuita kweakasiyana madosi e cellulose ether pane inomanikidza simba resimbi slag jecha dhaka, zvinogona kuoneka kuti mushure mekuwedzera HPMC2000 uye HPMC6000, iyo yekumanikidza simba redhaka pane imwe neimwe dosi inowedzera nezera. Kuwedzera HPMC2000 hakuna mhedzisiro iri pachena pamazuva makumi maviri nemasere ekumanikidza kwedhaka, uye kushanduka kwesimba hakusi kukuru; nepo HPMC2000 ine simba guru pane yekutanga (3-zuva uye 7-zuva) simba, ichiratidza maitiro ekuderera kuri pachena, kunyangwe iyo dosi inowedzera kusvika 0.25% uye Pamusoro, iyo yekutanga compression simba yakawedzera zvishoma, asi ichiri yakaderera pane iyo isina adding. Kana zvirimo zveHPMC6000 zvadzikira pane 0.20%, kukanganiswa kwesimba remazuva manomwe nemazuva makumi maviri nemasere hakuoneki, uye simba rekumanikidza remazuva matatu rinodzikira zvishoma nezvishoma. Apo zvinyorwa zveHPMC6000 zvakawedzera kusvika ku0.25% uye pamusoro, simba remazuva makumi maviri nemasere rakawedzera kune imwe nhanho, ndokubva raderera; simba remazuva manomwe rakadzikira, ndokuzoramba rakadzikama; simba remazuva matatu rakaderera nenzira yakagadzikana. Naizvozvo, zvinogona kutariswa kuti cellulose ethers ane maviri viscosities eHPMC2000 uye HPMC6000 haana pachena kushatisa mhedzisiro pamazuva makumi maviri nemasere ekumanikidza kwedhaka, asi kuwedzera kweHPMC2000 kune zvakanyanya kuoneka kwakashata pasimba rekutanga redhaka.

HPMC2000 ine madhigirii akasiyana ekushata pane inoshanduka simba redhaka, zvisinei nedanho rekutanga (mazuva matatu nemazuva manomwe) kana nguva yekupedzisira (mazuva makumi maviri nemasere). Kuwedzerwa kweHPMC6000 zvakare kune imwe dhigirii yekukanganisa kusimba kwedhaka, asi dhigirii rekukanganisa idiki pane iro reHPMC2000.

Mukuwedzera kune basa rekuchengetedza mvura uye kuwedzera, cellulose ether inononokawo hydration process ye simenti. Zvinonyanya kukonzerwa nekushambadza kwe cellulose ether molecules pane simenti hydration zvigadzirwa, zvakadai se calcium silicate hydrate gel uye Ca (OH) 2, kuumba chifukidzo chekuvhara; uyezve, viscosity yemushonga wepore inowedzera, uye cellulose ether inodzivisa Kutama kweCa2 + uye SO42- mukugadzirisa kwepore kunononoka hydration process. Nokudaro, simba rekutanga (mazuva matatu nemazuva manomwe) edhaka rakasanganiswa neHPMC rakaderedzwa.

Kuwedzera cellulose ether mudhaka kuchaumba huwandu hukuru hwemabhuru makuru ane dhayamita ye 0.5-3mm nekuda kwemhepo-intraining mhedzisiro ye cellulose ether, uye cellulose ether membrane chimiro chakashongedzwa pamusoro pemabhuru aya, ayo imwe nhanho inoita basa mukudzikamisa mabhubhu. basa, nokudaro kuderedza simba re defoamer mudhaka. Kunyange zvazvo mabhubhu emhepo akaumbwa akafanana nemabhora ebhora mudhaka richangobva kusanganiswa, izvo zvinovandudza kushanda, kana dhaka raomeswa nekuomeswa, mabhuru mazhinji emhepo anoramba ari mudhaka kuti agadzire pores akazvimirira, izvo zvinoderedza kuoneka kwedhaka. . Simba rekumanikidzika uye simba rekushanduka-shanduka rinoderera zvakakodzera.

Zvinogona kuonekwa kuti kana uchigadzirira simbi slag jecha inokosha dhaka ine yakakwirira fluidity, yakakwirira mvura kuchengetwa mwero uye yakakwirira simba, zvinokurudzirwa kushandisa HPMC6000, uye chipimo chemushonga haafaniri kuva mukuru kupfuura 0.20%.

mukupedzisa

Migumisiro yeviscosities miviri ye cellulose ethers (HPMC200 uye HPMC6000) pakuchengetedza mvura, fluidity, compressive uye flexural simba resimbi slag jecha dhaka rakadzidzwa kuburikidza nekuedza, uye maitiro ekuita kwe cellulose ether musimbi slag jecha dhaka yakaongororwa. Mhedziso dzinotevera:

(1) Pasinei nekuwedzera HPMC2000 kana HPMC6000, mwero wekuchengetedza mvura weichangobva kusanganiswa simbi slag jecha dhaka inogona kuvandudzwa zvakanyanya, uye maitiro ayo ekuchengetedza mvura anogona kuvandudzwa.

(2) Kana iyo dosi yakadzikira kupfuura 0.20%, mhedzisiro yekuwedzera HPMC2000 uye HPMC6000 pane fluidity yesimbi slag jecha dhaka haisi pachena. Kana zvirimo zvichiwedzera kusvika 0.25% uye pamusoro, HPMC2000 uye HPMC6000 vane imwe mhedzisiro yakaipa pakuyerera kwesimbi slag jecha dhaka, uye kukanganisa kwakashata kweHPMC6000 kunonyanya kuoneka.

(3) Kuwedzerwa kweHPMC2000 uye HPMC6000 hakuna mhedzisiro iri pachena pamazuva makumi maviri nemasere kusimba kwesimbi slag jecha dhaka, asi HPMC2000 ine mhedzisiro yakaipa pakusimba kwekutanga kwekumanikidza kwedhaka, uye simba rekuchinjika zvakare pachena harina kunaka. Kuwedzerwa kweHPMC6000 kune imwe mhedzisiro yakaipa pane flexural simba resimbi slag-jecha dhaka pamazera ese, asi dhigirii rekuita rakaderera zvakanyanya kupfuura iro reHPMC2000.