Izithasiselo zikakhonkolo ezingasindi | Ama-ejenti Akhipha Amagwebu Asebenza Kakhulu Wokhonkolo Weselula
Izinkinga ezijwayelekile ekusetshenzisweni kwe-polycarboxylic acid admixtures
Ngenqubo yokusebenzisa i-polycarboxylic plasticity, ngezinye izikhathi kukhona izinkinga ezinjalo, kanti ezinye izinkinga azikahlangatshezwana nazo uma kusetshenziswa izinto ezidambisa amanzi ezinciphisa amanzi. Ngokwesibonelo, ngezinye izikhathi imboni iyawa, uketshezi, nokugcinwa kwamanzi kuhle, kodwa izinto ezimbili ezeqisayo zenzeka ngemva kwesikhathi esithile.
Kuphakathi kokuthi ingxube kakhonkolo iba yome kakhulu, nokuphuma kubuhlungu, noma ukopha kubi kakhulu, ukuhlukaniswa, futhi i-delamination ibucayi.
Kunezizathu eziningi zezinkinga ekusetshenzisweni kweplastiki yekhonkrithi ye-polycarboxylic acid. Ngakolunye uhlangothi, izinga le-ejenti yokunciphisa amanzi ye-polycarboxylic acid alizinzile, kanye nezinhlobonhlobo zezinto zokwenziwa zokwenziwa kudala ukushintshashintsha okukhulu komkhiqizo. Izinga lobuchwepheshe, inqubo yokukhiqiza, kanye nezindlela zokulawula izinga ingxube ye-polycarboxylic acid yokunciphisa amanzi amabhizinisi okukhiqiza awazange aliqinisekise izinga.
Ngokolunye uhlangothi, ukushintshashintsha kwezinto ezibonakalayo zokhonkolo kubangele ushintsho lokuzivumelanisa nezimo nge i-polycarboxylic acid,
Sicela ucacise okulandelayo:
(1) usimende. Izingxenye zamakhemikhali zikasimende, uhlobo lwegypsum, izinsiza zokugaya, inani lezinto ezixubile ezisebenzayo nezingasebenzi, okuqukethwe kwe-alkali, ubuhle, kanye nezinga lokushisa ngesikhathi sokusetshenziswa konke kuzothinta ukuguquguquka kwezinciphisi zamanzi ze-polycarboxylic acid. Ngezinye izikhathi izinguquko ezincane zingabangela izinguquko ezinkulu ezakhiweni zangempela. Ngakho-ke, akufanelekile ukushintsha usimende njalo ekukhiqizeni kwangempela. Ukukhetha usimende onekhwalithi ethembekile kanye nekhwalithi ezinzile kuyimfuneko edingekayo ukuze kuqinisekiswe ikhwalithi ekhonkolo.
(2) Okuqukethwe kodaka kokuhlanganisa okumahhadlahhadla nokucolekile kunethonya elibalulekile ekuguquguqukeni kwesinciphisi samanzi se-polycarboxylic acid.. Njengoba okuqukethwe kodaka kwe-aggregate kuqhubeka nokwanda, izakhiwo ze-rheological zekhonkrithi zizophindwe kabili, okuholela ekuxubeni kukakhonkolo. Ukulawula ikhwalithi yezinto kuyinselele.
(3) Ukulahlekelwa ukuthungela nokucoleka kwe-admixture (i-mineral powder, fly umlotha) futhi kuthinta ukuguquguquka kwe-ejenti yokunciphisa amanzi ye-polycarboxylic acid. Lapho inani lokulahlekelwa okuvuthayo likhulu, i-polycarboxylic acid polycarboxylate superplasticizers izokhangiswa, okubangela Ukulahleka kokuwohloka kwengxube kakhonkolo kuyashesha.
Izinyathelo zokuqapha lapho usebenzisa i-polycarboxylic acid superplasticizer admixture
(1) Ukulawulwa okunengqondo kokusetshenziswa kwamanzi
I-Polycarboxylic acid superplasticizers zizwela kakhulu ekusetshenzisweni kwamanzi, ikakhulukazi uma usebenzisa ama-superplasticizers anokuqukethwe okuqinile okuphezulu. Ngesikhathi sokuhlolwa kanye nenqubo yokukhiqiza, kwatholakala ukuthi ngezinye izikhathi ukusetshenziswa kwamanzi kwenyuke kancane ngo-1kg ~ 3kg, futhi ingxube kakhonkolo yayiyoba nokopha okukhulu, wanqwabelanisa amatshe asobala, futhi wabamba phansi. Ngakho-ke, ohlelweni lokukhiqiza, Ngakolunye uhlangothi, ukusetshenziswa kwamanzi kweqembu elilodwa kulawulwa ngokuqinile, kanti umswakama wesihlabathi namatshe ubalwa ngokunembile. Isihlabathi esisanda kugezwa kufanele sishiywe isikhathi esithile futhi sisetshenziswe lapho umswakama uzinzile. Ngokolunye uhlangothi, i-ejenti yokunciphisa amanzi e-polycarboxylic acid ephansi isetshenziselwa ukunciphisa ukuzwela.
(2) Sebenzisa inani elanele le-polycarboxylic acid
Umthamo ofanele unqunywa ngokuhlolwa ngesikhathi sokusetshenziswa. Lapho umthamo uphansi, ukugcinwa kokuwohloka kokhonkolo kubi, ukulahleka kokuwohloka kuyashesha, futhi i-fluidity iba mpofu. Lapho umthamo mkhulu kakhulu, ingxube kakhonkolo ingase ibangele ukopha okukhulu, ukuhlukaniswa, Thatha phansi. Ngaphambi kokukhiqiza, kufanele uhlole indawo yokusika efanelekile yokusebenzisa amanzi kakhonkolo kanye nenani le-polycarboxylic acid plasticizer kanye ne-agent ye-superplasticizer, leyo, inani eliphelele lamanzi nengxube. Ngesikhathi esifanayo, qaphela ukwazi ukuguquguquka kwezinto zokusetshenziswa kanye nokuxuba i-ejenti ye-polycarboxylic acid. Umthelela yenani. Izinto zokusetshenziswa ezisetshenziswa kuphrojekthi kufanele zisetshenziswe ekuhlolweni ukuze kube lula ukulawula ukukhiqiza. Uma kunesidingo, izimo zokwakha indawo kufanele zilingiswe ngokwezidingo zokwakha.
(3) Isibindi sokuphula imodi yokucabanga yendabuko
When formulating high-strength grades, we strive to overcome the problem of using more cement and fewer mineral admixtures. We believe that this is safe, and the strength will be higher. Kungenjalo, the amount of cement tends to be thick, and the strength of the concrete develops quickly in the early stage, and the growth in the later period is slow or even not. Sometimes adding 30kg of cement is about the same strength as concrete without adding cement, and sometimes it is better not to add it. Properly increasing the amount of mineral admixture will increase the strength of concrete by 5% ku 10%, and the strong increase in the later period is also satisfactory. It will help reduce hydration heat, prevent cracks, futhi uthuthukise ukuqina.
(4) Naphthalene-based admixtures are strictly prohibited
Companies using both naphthalene-based superplasticizers and polycarboxylic acid-based superplasticizers, if conditions permit, are best used in separate stations. If the same unit has both polycarboxylic acid and naphthalene-based, when used alternately, The admixture weighing container, pipeline and mixer are thoroughly cleaned, and the concrete tanker should also be cleaned and refilled. It is strictly forbidden to mix naphthalene-based superplasticizer and polycarboxylic acid superplasticizer, especially at the construction site, when the method of “adding admixtures” is needed to adjust the workability of the concrete mixture, the concrete inside the vehicle must be clarified. The types of admixtures used can avoid the “rapid setting” of concrete caused by a mixing, which will cause the vehicle concrete to be scrapped.
(5) Strengthen inspection
Lapho i-ejenti yokunciphisa amanzi ye-polycarboxylic acid itholwa, qala uhlole izinkomba zobuchwepheshe ezihlukahlukene ze-ejenti yokunciphisa amanzi ukuze uqinisekise ukuzinza kwekhwalithi. Okwesibili, izinto ezisetshenziswayo kufanele zikhethwe, futhi isilinganiso sokuxuba ukukhiqiza kufanele sisetshenziselwe ukuhlola. Uma izinkinga zitholakala, abasebenzi bezobuchwepheshe bebhizinisi lokukhiqiza i-admixture kufanele balungiswe ngesikhathi.
(6) Ukuxhumana ngesikhathi neyunithi yokwakha
Ngaphambi kokukhiqiza ukhonkolo, iqembu lokwakha kufanele liziswe ngezidingo zobuchwepheshe zekhonkrithi.
Ibanga lezokuthutha, inqubo yokwakha, kanye nezinga lokushisa losuku, futhi uma kunesidingo, hamba endaweni yomsebenzi ukuze uhlolwe isayithi ukuze uqonde indlela yokumpompa okukhonkolo, noma ngabe umzila wepayipi ufanelekile, kanye nokusatshalaliswa kwezinsimbi zensimbi.
Ikhwalithi yabasebenzi nethimba lezokwakha leyunithi yokwakha izokwabelwa ngokunengqondo, futhi izimoto zizothunyelwa ngokwesimo sangempela.
(7) Ujwayelene nezici ze-polycarboxylic acid plasticizer kanye ne-superplasticizer esetshenzisiwe
Ngokuhlola, imithetho yokushintsha yama-ejenti okunciphisa amanzi e-polycarboxylic acid ekukhiqizeni-ukwakhiwa kwesivivinyo sikakhonkolo ifinyezwa, okuyinto elula ukubhekana nezimo eziphuthumayo. Hlola le mithetho ekuhloleni nasekukhiqizeni, buthelela ulwazi, futhi siphakamise ngokushesha izixazululo ezifanele uma kwenzeka izinguquko ezingazelelwe esimweni esiqinile, ukugwema ukubangela ukulahlekelwa okukhulu, futhi uzuze “ngesikhathi, ezesayensi, futhi kunengqondo.”
Ukuncishiswa kwamanzi e-Polycarboxylic acid kuzosetshenziswa kukho kokubili usimende onegwebu kanye nokhonkolo ojwayelekile usimende. Uma i-superplasticizer isetshenziswa ngendlela efanele, izobamba iqhaza ekuthuthukiseni ipulasitiki kusimende. Qiniseka ukuthi ulawula indlela kanye nenani le-polycarboxylate superplasticizer ngokuqinile.Ukuze umphumela amanani amancane kanye nomthelela omkhulu.
I-Cie-China.org ingumhlinzeki oholayo wezithasiselo zikakhonkolo wegwebu ohlinzeka nge-ejenti yokugwedla ukhonkolo, superplasticizer,isithuthukisi samandla kakhonkolo wegwebu kukhonkolo ongasindi, Amabhulokhi e-CLC. Uma ufuna superplasticizer, sicela ukhululeke Xhumana nathi.