HPMC inoshandisa mukongiri

Nhanganyaya

Parizvino, furo rinoshandiswa kugadzira kongiri rine furo rinogona kungoshandiswa kugadzira kongiri ine furo kana iine kuoma kwakakwana uye kugadzikana kana yakasanganiswa neslurry uye haina mhedzisiro yakaipa pakudzika uye kuomeswa kwezvinhu zvesimenti. Zvichienderana neizvi, kuburikidza nekuyedza, kuwedzera hydroxypropyl methyl cellulose (HPMC), inova rudzi rwefuro inodzikamisa chinhu, kuvandudza mashandiro eiyo yakadzokororwa diki-hupfu kongiri yakadzidzwa.

Foam pachayo kunaka kwakashata kunotaridza kunaka kwekongiri, kunyanya mune inodzoreredza hupfu foam kongiri, tsvina kongiri mushure mekupwanya, bhora rechigayo hupfu, rakagadzirwa nehupenyu hwaro huzhinji husina kuenzana uye nezvidimbu uye pore yemipendero nemakona, zvichienzaniswa nefuro rakajairwa. kongiri, yakadzokororwa hupfu mabubbles mune furo kongiri pasi pemakinika maitiro akanyanya kuomarara. Naizvozvo, zviri nani kuomarara, diki pore saizi, kufanana uye kupararira kwefuro mune slurry, zviri nani kunaka kweiyo yakadzokororwa micropowder foamed kongiri. Nekudaro, zvakakosha kuita mafuro ane kusimba kwepamusoro, saizi yakaenzana yepore uye chimiro. Mukuita kwekushandisa foam agent, foam stabilizer inoita basa rakakosha. Mazhinji efoam stabilizer ndeye glue zvinhu, izvo zvinogona kuwedzera viscosity yemhinduro uye kushandura fluidity yayo kana yakanyungudika mumvura. Kana yakashandiswa pamwe chete neanoita furo, inowedzera zvakananga iyo yemvura firimu viscosity yefuro, inowedzera elasticity yemabhuru uye kusimba kwepamusoro kwefirimu remvura.1 bvunzo

1.1 iyo yakabikwa

(1) Simende: 42.5 yakajairika Portland simende.

(2) Hupfu hwakatsetseka: Mienzaniso yekongiri yakasiiwa murabhoritari yakasarudzwa uye yakapwanyiwa kuita zvidimbu zvine saizi isingasviki 15mm nekupwanya shaya, yozoiswa muguyo rekukuya. Mukuedza uku, iyo micropowder yakagadzirirwa nekukuya nguva ye60min yakasarudzwa.

(3) Foaming agent: sipo inopupuma mumiririri, isina kwayakarerekera mwenje yero viscous fluid.

(4) Foam stabilizer: hydroxypropyl methyl cellulose (HPMC), giredhi yezvigadzirwa zvekuvaka maindasitiri, hupfu, inonyungudika nyore mumvura.

(5) Mvura: mvura yekunwa. Izvo zvakakosha zvemuviri zvimiro zvecementitious zvinhu .

1.2 Sanganisa chiyero dhizaini uye kuverenga

1.2.1 Sanganisa dhizaini

Munguva yekutongwa, inogona kuwedzera kana kuderera yehupfu hwehupfu hwekongiri mune zviri mukati, kugadzirisa saizi yekuoma density, kuburikidza nekugadzira specimen vhoriyamu musiyano saizi, saizi chaiyo uye dhizaini kune yakashata fungidziro yekukanganisa dhigirii rekugadzira dhizaini, inovandudzwa furo furo. kongiri fluidity ye slurry size control mukati me180 mm + 20 mm.

1.2.2 Kuverengera kwemusanganiswa ratio

Yese chiyero dhizaini yekuumba 9 mapoka eakajairwa zvidhinha (100mmx100mmx100mm), akajairwa.

Iyo yakazara vhoriyamu yebvunzo block V0 = (0.1 × 0.1 × 0.1) x27 = 2.7 × 10-2m3, isa iyo yakazara vhoriyamu V =

1.2×2.7×10-2 = 3.24×10-2m3, furo mumiririri dosage M0 =0.9V = 0.9×3.24×10-2 =

2.916 × 10-2kg, mvura inodiwa kuti diluting furo agent ndeye MWO.

2. Migumisiro yekuedza uye nhaurirano

Nekugadzirisa dosage yeHPMC, pesvedzero yeakasiyana furo masisitimu pane ekutanga zvivakwa zvekongiri yakadzokororwazve diki-upfu foamed kongiri yakaongororwa. Iyo michina yemhando yega yega yakaedzwa.

2.1 Kupesvedzera kweHPMC dosi pakuita furo

Kutanga, ngatitarisei "mafuro matete" uye "mafuro akakora". Foam kuparadzirwa kwegasi mumvura. Mabhubhu anogona kukamurwa kuita "bubble rakatetepa" rine mvura yakawanda uye shoma gasi uye "gobvu bubble" rine mvura yakawanda uye shoma gasi. Nekuda kwekuvapo kwehombe yemvura, uye kuyerera kwemvura, furo kongiri slurry yakaitwa yakatetepa kwazvo, uye mvura inoyerera yakawanda, iri nyore kubudisa giravhiti remvura, saka recycled upfu furo kongiri rakagadzirirwa nesimba rakaderera, zvakawanda. yakabatana pores, iri pasi furo. Gasi rakawanda remvura rishoma furo, stoma kuumbwa kwakaomarara, inongopatsanurwa nechidimbu chemvura firimu, kuunganidzwa kwefuro density kwakatetepa bubble density, kuumbwa kubva pakuvandudzwa kweiyo micro powder foam kongiri yakavharwa pores, simba rakakura, rakakwirira. -hupfu hwemhando.

Nekuwedzera kweHPMC dosage, kuwanda kwefuro kwakawedzera zvishoma nezvishoma, zvichiratidza kuti furo racho rakawedzera kukora, furo rinopupa richipupuma rakawanda risati rasvika 0.4% rine mhedzisiro yakawedzera, inodarika 0.4% mushure meiyo inhibition effect, zvichiratidza kuti viscosity yefoaming agent solution inowedzera, inokanganisa kugona kupupa. Nekuwedzera kweHPMC dosage, iyo furo secretion uye nzvimbo yekugara inodzikira zvishoma nezvishoma. Pamberi pe 0.4%, chiyero chekudzikira chakakura, uye kana mwero wakadarika 0.4%, mwero unodzikira, zvichiratidza kuti nekuwedzera kweanopupuma agent solution viscosity, mvura iri mububble liquid film haisi nyore kuburitsa kana kubuda kwacho kwakanyanya. diki, uye mvura iri pakati pemafuru haisi nyore kuyerera. Iyo bubble liquid firimu ukobvu inodzikira zvishoma nezvishoma, iyo bubble kuputika nguva inorebesa, iyo bubble liquid firimu repamusoro simba rinowedzerwa, furo zvakare rine imwe dhigirii yekunyungudika, kuitira kuti iite kugadzikana kwefuro.

Yakagadziridzwa zvakanyanya. Iyo yekumisikidza chinhambwe kukosha mushure me0.4% inoratidzawo kuti furo harina kugadzikana panguva ino. Muchina wekupupa unonetsa kupupa pa 0.8%, uye kuita kwefuro ndiko kwakanyanya pa 0.4%, uye furo density i59kg/m3 panguva ino.

2.2 Pesvedzero yezvemukati meHPMC pamhando yekudzokororwa diki-hupfu yakafurwa nekongiri slurry

Nekuwedzera kweHPMC yemukati, kuwirirana kwe slurry kunowedzera. Kana zviri mukati zviri pasi pe0.4%, kuwirirana kunowedzera zvishoma nezvishoma uye zvishoma nezvishoma, uye kana zviri mukati zvinopfuura 0.4%, chiyero chinowedzera zvakanyanya, zvichiratidza kuti furo racho rakanyanyisa, mvura shoma shoma, uye yakakwirira furo viscosity. Mukuita kwekuwedzera muyero, furo misa mu slurry ndiyo yakanakisa mumhando ye 0.4% ~ 0.6%, uye furo mhando yakashata kunze kweiyi chiyero. Kana zviri mukati zviri pasi pe0.4%, kugoverwa kwemhepo pores mu slurry kwakafanana uye kunoratidza kugadzikana kwekugadzirisa. Kana zvirimo zvikadarika izvi zvirimo, kugoverwa kwemhepo pores kunoratidza hunhu hwakakura husina kuenzana, hunogonawo kunge huri nekuda kwekunyanya kuwanda uye viscosity yefuro uye kusanaya kwemvura, zvichikonzera kuti mabhubhu haakwanise kuparadzirwa zvakaenzana muslurry panguva yekumhanyisa maitiro. .

2.3 Pesvedzero yezvemukati meHPMC pakuita kweiyo yakadzokororwa micropowder foamed kongiri

Hazvina mhosva kuti furo rinogadzirwa sei, ukuru hwehuputi muhuputi hahuzombofi hwakafanana zvachose. Muedzo wehupfu yakadzokororwa mushure mekupwanya nzira yekukuya, chimiro chayo hachina kufanana, yakatsetseka mububble uye yakasanganiswa slurry kusanganisa, chimiro chisina kujairika cheslurry nemakona uye makona, spikes yezvimedu zvinogona kuburitsa yakaipisisa mhedzisiro yefuro, ivo vanobatana kupfuura. senzvimbo yekubatana nepamusoro, gadzira kushushikana, kubaya bubble, zvichikonzera mabhubhu kuputika, saka, Kugadzirira kwe micropowder yakadzokororwa. foamed kongiri inoda kugadzikana kwepamusoro kwefuro. Mufananidzo 4 unoratidza kurudziro yemitemo yakasiyana yefuro masisitimu pakuita kweiyo yakadzokororwa micropowder foamed kongiri.

Pamberi pe0.4%, iyo yakaoma density yakadzikira zvishoma nezvishoma uye mwero wakakurumidza, uye kunyura kwemvura kwakavandudzwa. Mushure me 0.4%, iyo yakaoma density inoshanduka, uye mwero wekutora mvura unowedzera kamwe kamwe. Mu3D, iyo yekumanikidza simba haina mutsauko pamberi pe0.4%, uye kukosha kwesimba kunosvika 0.9mpa. Mushure me0.4%, kukosha kwekusimba kudiki. Iyo yekumanikidza simba pa7d ine mutsauko uri pachena. Kukosha kwesimba pamuyero we0.0 zviri pachena kuti hakuna hombe seiyo pa 0.2% uye 0.4%, asi yakakwirira kupfuura iyo pa 0.6% uye 0.8%, uye kukosha kwesimba pa 0.2% uye 0.4% kuchiri nemusiyano mudiki. Shanduko yekukosha kwesimba pa28d yaive yakangofanana neiyo pa7d.

Dosage 0.0 basic show bubble rakatetepa, kuoma kwebubble, kugadzikana kwakashata, mukuita kweslurry mixing uye specimen condense sclerosis, kune yakawanda yekuputsika kwebubble, mukati porosity yemuenzaniso yakakwira, mushure mekugadzira specimen kuita kwakashata, kuwedzera kwedosi, kuita kwayo zvishoma nezvishoma kunowedzera, bubble riri muslurry rakapararira zvakaenzana uye rakaputika kusvika kudiki. dhigirii, Mushure mekuumbwa, kune mamwe maburi akavharwa mukati mechimiro chemukati chemuenzaniso, uye chimiro, aperture uye porosity yemakomba zviri nani kuvandudzwa, uye kuita kwemuenzaniso kuri nani. Yakaratidza maitiro ekuderera 0.4%, simba uye kukosha kwayo hakuna kukwirira se0.0, inogona kunge iri nekuda kwekuti furo density uye viscosity yakakura kwazvo, illiquid chikonzero mukugadzirisa slurry, furo haigoni kusanganiswa nesamende dhaka, bubble inogona ' t ive yakanyatso kuparadzirwa mune slurry, izvo zvinoita kuti kuumbwa kwemuenzaniso ukuru hwemadhigirii akasiyana emabhuru, Semhedzisiro, kune makomba makuru uye maburi akabatanidzwa mumuenzaniso mushure mekusimba uye kuoma, zvichiita kuti pave nekusagadzikana kwemaitiro, simba rakaderera uye kunyura kwemvura kwakakwirira kwemakomba emukati emuenzaniso. Mune iyo nhamba, chikonzero chikuru chekuchinja kwesimba ndeye pore junctions mukati memukati meiyo micropowder foam kongiri.

Iko kunatsiridzwa kwechimiro kunoratidza zvakare kuti HPMC haina mhedzisiro yakaipa pa hydration ye simenti. Kana HPMC yemukati inenge iri pakati pe0.2% ~ 0.4%, simba reiyo yakadzokororwa micropowder foamed kongiri iri nani.

3 mhedziso

Foam chinhu chinodiwa pakugadzira kongiri ine furo, uye hunhu hwayo hwakanangana nemhando yekongiri ine furo. Kuti uve nechokwadi chekugadzikana kwakakwana kwemafuro, furo mumiriri uye HPMC zvinosanganiswa kushandisa. Kubva pakuongororwa kwefuro, slurry uye yekupedzisira kongiri mhando, inowanikwa kuti:

(1) Kuwedzerwa kweHPMC kune yakanaka yekuvandudza maitiro pakuita kwefuro. Zvichienzaniswa 0.0, furo mumiririri furo reshiyo yakawedzera ne 1.8 nguva, furo density yakawedzera 21 makirogiramu/m3, 1h kubuda ropa mvura yakaderera ne 48 mL, 1h kugadzirisa kureba kwakaderera ne15 mm;

(2) iyo HPMC yakawedzera kuvandudza kudzoreredzwa kwehupamhi hwehupfu hwehupfu hwekongiri slurry, zvichienzaniswa nekusasanganisa, zvine hungwaru kuwedzera slurry kuenderana, kuvandudza mvura uye kugadzirisa kugadzikana kwe slurry bubble, kuwedzera kufanana kwefuro. yakapararira mu slurry, kuderedza gomba rekubatanidza, gomba guru uye kubuda kwechiitiko chakadai sekudonha mode, dosage ye. 0.4%, Mushure mokunge mufananidzo wekuumba wakatemwa, kuvhara kwayo kuduku, chimiro chegomba chakanyanya kutenderera, kugoverwa kwegomba kunowedzera yunifomu;

(3) Kana HPMC yemukati iri 0.2% ~ 0.4%, iyo 28d yekumanikidza simba recycled micropowder foamed kongiri yakakwira, asi tichifunga nezvekuoma kwemvura, kunyura kwemvura uye simba rekutanga, chakanakisa ndechekuti HPMC yemukati iri 0.4%. Panguva ino, yakaoma density 442 kg/m3, 7d compressive simba 2.2mpa, 28d compressive simba 3.0mpa, mvura absorption 28%. HPMC inoita basa rakanaka mukuita kweiyo yakadzokororwa diki-hupfu yakapushwa kongiri, iyo inoratidza kuti HPMC ine yakanaka kuchinjika uye kugarisana kana ichishandiswa pakudzokorora diki-hupfu ine furo kongiri.