Kwanan Wata: 8, Yuli, 2024
1. Yawan raguwar ruwa yana jujjuyawa daga sama zuwa ƙasa, yana da wahala a iya sarrafawa yayin aikin.
Abubuwan tallatawa na wakilai masu rage ruwa na tushen polycarboxylic acid sau da yawa suna haɓaka tasirin su na rage yawan ruwa, kamar ƙimar rage ruwa na 35% ko ma 40%. Wani lokaci adadin raguwar ruwa yana da yawa sosai idan aka gwada shi a cikin dakin gwaje-gwaje, amma idan aka zo wurin aikin, galibi abin mamaki ne. Wani lokaci adadin raguwar ruwa bai wuce 20% ba. A gaskiya ma, adadin rage ruwa yana da ma'ana mai tsanani. Yana nufin kawai amfani da siminti na ma'auni, wani ƙayyadaddun mahaɗa, ƙayyadaddun tsarin hadawa, da sarrafa ɓacin rai zuwa (80+10) mm daidai da ma'aunin "Concrete Admixtures" GB8076. bayanan da aka auna a lokacin. Koyaya, mutane koyaushe suna amfani da wannan kalmar a lokuta daban-daban don bayyana tasirin rage ruwa na samfuran, wanda galibi yana haifar da rashin fahimta.
2. Mafi girman yawan adadin ruwa mai rage ruwa, mafi kyawun tasirin rage ruwa.
Don saita siminti mai ƙarfi mai ƙarfi da kuma rage rabon siminti na ruwa, injiniyoyi da ma'aikatan fasaha galibi suna buƙatar ci gaba da ƙara yawan adadin ruwa na polycarboxylate don samun sakamako mai kyau. Koyaya, tasirin rage ruwa na tushen polycarboxylic acid mai rage ruwa yana dogara sosai akan adadin sa. Gabaɗaya, yayin da adadin adadin mai rage ruwa ya ƙaru, ƙimar rage ruwa yana ƙaruwa. Duk da haka, bayan kai wani sashi, tasirin rage ruwa yana "rage" yayin da adadin ya karu. Wannan ba yana nufin cewa tasirin rage ruwa yana raguwa lokacin da aka ƙara yawan adadin ba, amma saboda mummunan zubar da jini yana faruwa a cikin simintin a wannan lokacin, ƙwayar kankare yana da wuyar gaske, kuma ruwa yana da wuyar ganewa ta hanyar slump.
Don tabbatar da cewa sakamakon gwajin polycarboxylic acid superplasticizer samfuran duk sun cika ka'idodi, adadin samfurin da aka ƙayyade lokacin ƙaddamarwa don dubawa ba zai iya yin girma da yawa ba. Saboda haka, rahoton ingancin samfurin yana nuna wasu mahimman bayanai kawai, kuma tasirin aikace-aikacen samfurin dole ne ya dogara ne akan ainihin sakamakon gwaji na aikin.
3. Kankare da aka shirya tare da polycarboxylate mai rage ruwa yana zubar da jini sosai.
Alamomi da ke nuna aikin gaurayawan kankare yawanci sun haɗa da ruwa, haɗin kai da riƙe ruwa. Kankare da aka shirya tare da abubuwan haɗin ruwa na tushen polycarboxylic acid ba koyaushe yana cika buƙatun amfani ba, kuma matsaloli iri ɗaya ko wani sau da yawa suna faruwa. Saboda haka, a ainihin gwaje-gwaje, yawanci har yanzu muna amfani da kalmomi kamar tsananin fallasa dutse da tarawa, zubar da jini mai tsanani da rarrabuwa, tarawa da ƙasa don bayyana fayyace aikin gaurayawan kankare. Kaddarorin abubuwan haɗin kankare da aka shirya ta amfani da yawancin abubuwan rage ruwa na tushen polycarboxylic acid suna da matukar damuwa ga amfani da ruwa.
Wani lokaci amfani da ruwa yana ƙaruwa kawai da (1-3) kg/m3, kuma cakuɗen kankare zai zubar da jini da gaske. Yin amfani da irin wannan cakuda ba zai iya tabbatar da daidaiton zubewa ba, kuma zai iya haifar da rami, yashi, da ramuka a saman tsarin. Irin wannan lahani da ba a yarda da shi yana haifar da raguwa a cikin ƙarfi da dorewa na tsarin. Saboda rashin kula da ganowa da sarrafa jimlar abun ciki a cikin tashoshi na kankare na kasuwanci, yana da sauƙi a ƙara yawan ruwa yayin samarwa, wanda ke haifar da zub da jini da warewar haɗin kankare.
Lokacin aikawa: Jul-08-2024
