HPMC na-eji na konkịtị

Okwu mmeghe

Ka ọ dị ugbu a, a na-eji ụfụfụ eme ihe na-eme ka ọ bụrụ ihe na-eme ka ọ bụrụ ihe siri ike na nkwụsi ike mgbe ọ na-ejikọta ya na slurry na-enweghị mmetụta ọjọọ na condensation na ike nke ihe cimenti.Dabere na nke a, site na nnwale, na-agbakwunye hydroxypropyl methyl cellulose (HPMC), nke bụ ụdị ihe na-eme ka ụfụfụ na-eme ka ọ dịkwuo mma, iji meziwanye arụmọrụ nke micro-powder foamed concrete a na-emegharịgharị.

Ụfụ n'onwe ya àgwà ọma ọjọọ na-ekpebi àgwà nke ihe, karịsịa na regenerative ntụ ntụ ụfụfụ ihe, n'efu ihe mgbe etipịa, bọl igwe nri ntụ ntụ, mere site na ya ịdị adị ọtụtụ uneven na na ahụ na pore nke n'ọnụ na nkuku, tụnyere ndị nkịtị ụfụfụ. ihe, recycled ntụ ntụ egosipụta na ụfụfụ ihe n'okpuru n'ibu mmetụta ka njọ.Ya mere, mma ndị siri ike, obere pore size, uniformity na mgbasa nke ụfụfụ na slurry, mma àgwà nke recycled micropowder foamed ihe.Otú ọ dị, ọ dị ezigbo mkpa ịme ụfụfụ na-esi ike dị elu, nha nha nha nha na ọdịdị.N'ime usoro iji ihe na-emepụta ụfụfụ, foam stabilizer na-arụ ọrụ dị oke mkpa.Ọtụtụ n'ime ụfụfụ stabilizer bụ ihe gluu, nke nwere ike ime ka viscosity nke ngwọta gbanwee ma gbanwee mmiri ya mgbe agbazere na mmiri.Mgbe eji ya na ụfụfụ gị n'ụlọnga, ọ ozugbo enwekwu mmiri mmiri film viscosity nke ụfụfụ, enwekwu elasticity nke egosipụta na elu ike nke mmiri mmiri film.1 ule

1.1 ihe eji eme ihe

(1) Simenti: 42.5 nkịtị Portland ciment.

(2) ezigbo ntụ ntụ emegharịrị: A na-ahọrọ ụdị ihe ndị ahụ a gbahapụrụ n'ụlọ nyocha wee gwerie ya na ụmụ irighiri ihe na-erughị 15mm site n'agba nhịhịa, wee tinye ya n'ime igwe igwe maka igwe nri.N'ime nnwale a, a na-ahọrọ micropowder nke a kwadebere site na oge igwe ihe nke 60min.

(3) Onye na-ahụ maka ụfụfụ: onye na-eme ụfụfụ ncha, mmiri mmiri viscous na-anọpụ iche.

(4) Foam stabilizer: hydroxypropyl methyl cellulose (HPMC), ụlọ ọrụ mmepụta ihe ọkwa ọkwa, ntụ ntụ, mfe soluble na mmiri.

(5) Mmiri: mmiri ọṅụṅụ.Njirimara anụ ahụ bụ isi nke ihe cimenti.

1.2 Mix ratio imewe na ngụkọta oge

1.2.1 Ngwakọta imewe

N'oge ikpe, nwere ike na-amụba ma ọ bụ ibelata mmeghari ntụ ntụ ụfụfụ ihe na ọdịnaya, ka mezie size nke akọrọ njupụta, site na-akpụ specimen olu dị iche size, n'ezie size na imewe ka a siri ike atụmatụ njehie ogo nke imewe nnwale, mmeghari uzuzu ụfụfụ. mmiri mmiri siri ike nke njikwa nha slurry n'ime 180 mm + 20 mm.

1.2.2 Ngụkọta mkpokọta ngwakọta

Onye ọ bụla ruru imewe ịkpụzi 9 otu ọkọlọtọ blocks (100mmx100mmx100mm), ọkọlọtọ.

Mkpokọta olu nke ngọngọ ule V0 = (0.1 × 0.1 × 0.1) x27 = 2.7 × 10-2m3, tọọ mkpokọta V =

1.2 × 2.7 × 10-2 = 3.24 × 10-2m3, onye na-ahụ maka ụfụfụ M0 = 0.9V = 0.9 × 3.24 × 10-2 =

2.916 × 10-2kg, mmiri chọrọ maka diluting foaming gị n'ụlọnga bụ MWO.

2. Nsonaazụ nnwale na mkparịta ụka

Site n'ịgbanwe usoro onunu ogwu nke HPMC, a tụlere mmetụta nke sistemu ụfụfụ dị iche iche na ihe ndị bụ isi nke micro-powder foamed koncre recycled.A nwalere ihe eji arụ ọrụ nke ụdịdị ọ bụla.

2.1 Mmetụta nke usoro onunu ogwu HPMC na arụmọrụ ụfụfụ

Nke mbụ, ka anyị leba anya na “afụ dị gịrịgịrị” na “afụ siri ike”.Ụfụfụ bụ mgbasa nke gas na mmiri mmiri.Enwere ike kewaa afụ n'ime "afụ dị nro" nke nwere mmiri mmiri na obere gas na "oke afụ" nwere mmiri mmiri na obere gas.N'ihi ịdị adị nke a nnukwu ego nke mmiri afụ, na elu fluidity, na ụfụfụ ihe slurry mere bụ nnọọ mkpa, na afụ mmiri bụ ihe, mfe na-emepụta ike ndọda, otú ahụ recycled ntụ ntụ ụfụfụ ihe kwadebere site ala ike, ọzọ. ejikọrọ pores, bụ usụhọde ụfụfụ.Gas ọzọ mmiri mmiri obere ụfụfụ, stoma guzobe bụ ok, naanị kewapụrụ a mkpa oyi akwa nke mmiri film, ìgwè nke ụfụfụ njupụta bụ dịtụ mkpa afụ njupụta, ịkpụzi nke regeneration nke Micro ntụ ntụ ụfụfụ ihe mechiri emechi pores, elu ike, dị elu. -ụfụ dị mma.

Site na mmụba nke usoro onunu ogwu nke HPMC, njupụta nke ụfụfụ ji nwayọọ nwayọọ na-abawanye, na-egosi na ụfụfụ ahụ na-abawanye ụba, onye na-emepụta ụfụfụ na-afụ ụfụ n'ọtụtụ ebe tupu 0.4% nwere mmetụta dị ntakịrị karịa 0.4% mgbe mmetụta mgbochi ahụ gasịrị, na-egosi na viscosity nke ihe na-emepụta ihe na-emepụta ụfụfụ na-abawanye, na-emetụta ikike ịfụfụ.Site na mmụba nke usoro onunu ogwu HPMC, ihe nzuzo nke ụfụfụ na anya ebe obibi ji nwayọọ nwayọọ na-ebelata ọnụ ọgụgụ.Tupu 0.4%, ọnụ ọgụgụ nke mbelata dị ukwuu, na mgbe ọnụego ahụ gafere 0.4%, ọnụego ahụ na-ebelata, na-egosi na mmụba nke foaming agent solution viscosity, mmiri mmiri na afụ mmiri mmiri film adịghị mfe ihapu ma ọ bụ ihapu bụ nnọọ. obere, na mmiri mmiri n'etiti egosipụta adịghị mfe eruba.The afụ mmiri mmiri film ọkpụrụkpụ ebelata nwayọọ nwayọọ, afụ na-agbawa oge na-adịte aka, afụ mmiri mmiri film elu ike na-enwekwukwa, ụfụfụ nwekwara ụfọdụ n'ókè nke elasticity, nke mere na-eme ka kwụsie ike nke ụfụfụ.

Ewelitela nke ukwuu.Ọnụ ego nkwụsịtụ mgbe 0.4% gasịrị na-egosipụtakwa na ụfụfụ ahụ kwụsiri ike n'oge a.Igwe ụfụfụ na-esiri ike ịfụ ụfụ na 0.8%, na arụmọrụ ụfụfụ kachasị mma na 0.4%, na njupụta ụfụfụ bụ 59kg / m3 n'oge a.

2.2 Mmetụta nke ọdịnaya HPMC n'ịdị mma nke obere ntụ ntụ ntụ ntụ emegharịrị slurry.

Site na mmụba nke ọdịnaya HPMC, nkwụsi ike nke slurry na-abawanye.Mgbe ọdịnaya ahụ na-erughị 0.4%, nkwụsi ike na-abawanye nwayọọ nwayọọ na nwayọọ nwayọọ, na mgbe ọdịnaya dị karịa 0.4%, ọnụego ahụ na-emewanyewanye nke ọma, na-egosi na ụfụfụ dị oke oke, obere mmiri afụ, na viscosity foam dị elu.N'ime usoro ịba ụba nke usoro onunu ogwu, oke ụfụfụ na slurry bụ ihe kachasị mma na 0.4% ~ 0.6%, na àgwà ụfụfụ adịghị mma n'èzí nke a.Mgbe ọdịnaya dị n'okpuru 0.4%, nkesa nke ikuku ikuku na slurry bụ otu ma na-egosi ọganihu na-aga n'ihu.Mgbe ọdịnaya karịrị nke a ọdịnaya, nkesa nke ikuku pores na-egosi a ịrịba na-ezighị ezi omume, nke nwekwara ike ịbụ n'ihi na oke njupụta na viscosity nke ụfụfụ na ogbenye fluidity, na-akpata na egosipụta enweghị ike evenly chụsasịrị na slurry n'oge edemede usoro. .

2.3 Mmetụta nke ọdịnaya HPMC na ịrụ ọrụ nke micropowder emegharịgharịrị na-agbapụta ụfụfụ

N'agbanyeghị otú e si emepụta ụfụfụ ahụ, nha nke egosipụta na ụfụfụ ahụ agaghị adị kpamkpam.Ule nke recycled n'efu ntụ ntụ mgbe egwepịara egweri usoro, ya udi bụghị edo, ezigbo na afụ na mbuaha slurry Ịgwakọta, oge ufodu udi nke slurry na n'ọnụ na nkuku, spikes nke ahụ nwere ike na-emepụta nnọọ oghom mmetụta nke ụfụfụ, ha na-akpọtụrụ karịa. dị ka ebe a na-ahụ anya n'elu, na-emepụta nrụgide nrụgide, na-agbapụ afụ, na-eme ka egosipụta na-agbawa, ya mere, Nkwadebe nke micropowder foamed ihe eji emegharị ihe na-achọ nkwụsi ike dị elu nke ụfụfụ ahụ.Ọnụọgụ 4 na-egosi mmetụta ọchịchị nke usoro ụfụfụ dị iche iche na-arụ ọrụ nke micropowder foamed concre recycled.

Tupu 0.4%, njupụta akọrọ ji nwayọọ nwayọọ na-ebelata na ọnụego ahụ dị ngwa ngwa, na ntinye mmiri na-eme ka ọ dịkwuo mma.Mgbe 0.4% gasịrị, njupụta akọrọ na-agbanwe, na ntinye mmiri na-abawanye na mberede.Na 3D, ike mkpakọ n'ụzọ bụ isi enweghị ihe dị iche tupu 0.4%, yana uru ike dị ihe dịka 0.9mpa.Mgbe 0.4% gasịrị, uru ike dị ntakịrị.Ike mkpakọ na 7d nwere ọdịiche doro anya.Uru ike na nhazi nke 0.0 doro anya na ọ bụghị dị ka nke ahụ na 0.2% na 0.4%, ma dị elu karịa nke ahụ na 0.6% na 0.8%, na uru ike na 0.2% na 0.4% ka nwere ntakịrị ihe dị iche.Mgbanwe nke uru ike na 28d bụ otu ihe ahụ na 7d.

Usoro onunu ogwu 0.0 bụ isi na-egosi afụ dị gịrịgịrị, afụ siri ike, nkwụsi ike dị njọ, n'ime usoro ịgwakọta slurry na specimen condense sclerosis, enwere ọtụtụ mmebi nke afụ, porosity dị n'ime nke ụdị ahụ dị elu, mgbe emechara arụmọrụ adịghị mma, yana na-abawanye nke onunu ogwu, ya arụmọrụ nke nta nke nta na-mma, na afụ na slurry chụgara ọzọ evenly na wuwa ka a nta ogo, Mgbe ịkpụzi, e nwere ndị ọzọ mechiri emechi oghere na esịtidem Ọdịdị nke ụdị, na udi, aperture na porosity nke. A na-eme ka oghere ndị ahụ dịkwuo mma, na arụmọrụ nke ihe atụ ahụ ka mma.Gosiri a na-emekarị nke mbelata 0,4%, ike na ya uru adịghị elu dị ka 0.0, nwere ike ịbụ n'ihi na ụfụfụ njupụta na viscosity bụ oke ibu, illiquid kpatara na usoro nke ịgwakọta slurry, ụfụfụ enweghị ike mix na ciment ngwa agha, na afụ nwere ike ' t na-adị mma evenly chụsasịrị na slurry, nke na-arụpụta na-akpụ nke ihe atụ bụ size nke dị iche iche n'ókè nke egosipụta, N'ihi ya, e nwere nnukwu oghere na jikọọ oghere na ụdị mgbe solidification na hardening, n'ihi na ogbenye Ọdịdị. , ike dị ala na oke mmịnye mmiri nke oghere dị n'ime nke ihe atụ.Na ọnụ ọgụgụ ahụ, isi ihe kpatara mgbanwe ike bụ nkwụsị nke pore n'ime akụkụ nke micropowder foam concrete.

Ọganihu nke nhazi na-egosipụtakwa na HPMC enweghị mmetụta ọjọọ na hydration nke ciment.Mgbe ọdịnaya HPMC dị na nso nke 0.2% ~ 0.4%, ike nke micropowder foamed koncre recycled ka mma.

3 nkwubi okwu

Ụfụfụ bụ ihe dị mkpa maka ịme ihe na-egbuke egbuke, àgwà ya na-ejikọta kpọmkwem na àgwà nke ụfụfụ.Iji hụ na nkwụsi ike nke ụfụfụ zuru oke, a na-agwakọta onye na-afụ ụfụfụ na HPMC iji mee ihe.Site na nyocha nke ụfụfụ, slurry na njedebe ikpeazụ, a chọpụtara na:

(1) Mgbakwunye nke HPMC nwere mmetụta dị mma na-arụ ọrụ nke ụfụfụ.E jiri ya tụnyere 0.0, onye na-emepụta ụfụfụ na-emepụta ụfụfụ mụbara site na 1.8 ugboro, ụfụfụ ụfụfụ mụbara site na 21 kg / m3, 1h mmiri na-agba ọbara na-ebelata site na 48 mL, 1h nhazi anya na-ebelata site na 15 mm;

(2) na HPMC gbakwunyere melite regeneration nke mkpokọta àgwà nke ntụ ntụ ụfụfụ ihe slurry, tụnyere bụghị mix, ezi uche na-amụba slurry agbanwe agbanwe, melite liquidity na melite nkwụsi ike nke slurry afụ, welie uniformity nke ụfụfụ. gbasasịa na slurry, belata njikọ oghere, nnukwu oghere na ntoputa nke onu dị ka ọdịda mode, onunu ogwu nke 0,4%, Mgbe ịkpụzi ụdị e bepụ, ya oghere dị obere, ọdịdị nke oghere bụ ihe gburugburu, na nkesa nke oghere bụ karịa edo;

(3) Mgbe ọdịnaya HPMC bụ 0.2% ~ 0.4%, ike mkpakọ 28d nke micropowder foamed concrete recycled dị elu, mana na-atụle njupụta akọrọ, nnabata mmiri na ike mmalite, ihe kacha mma bụ mgbe ọdịnaya HPMC bụ 0.4%.N'oge a, akọrọ njupụta 442 kg / m3, 7d compressive ike 2.2mpa, 28d compressive ike 3.0mpa, mmiri absorption 28%.HPMC na-arụ ọrụ dị mma n'ịrụpụta obere ntụ ntụ ntụ ntụ emegharịrị, nke na-egosipụta na HPMC nwere ngbanwe dị mma na ndakọrịta mgbe ejiri ya mee ihe na obere ntụ ntụ ntụ ntụ.