Kwanan Wata:31,Oct,2022
Concrete admixturesan yi amfani da kankare kusan shekaru ɗari azaman samfuri. Amma tun a zamanin da, a haƙiƙanin gaskiya, ’yan Adam sun daɗe da sanin amfani da wasu abubuwan da ake ƙarawa wajen gina siminti. Bayanan da aka tabbatar sun rubuta cewa a cikin 1885 Turawa sun riga sun san cewa an ƙara masu sarrafa ƙarfi, irin su lemun tsami da gypsum, zuwa kankare. A ƙarshen ƙarni na 19, yin amfani da sinadarin calcium chloride ya kasance abin haushi kuma har yanzu ana amfani da shi a yau. A shekara ta 1895, an ƙara masu faɗaɗa ruwa da robobi a cikin simintin don shimfida titin, wanda hakan ya inganta ƙarfin simintin.
An fara ganin samfuran masana'antu na yau da kullun a cikin 1910. Lokacin da aka haɓaka Arewacin Amurka a Amurka a cikin 1930s, daskararre tafkin simintin da sauri saboda tsananin sanyi. Domin inganta ingancin simintin gyaran kafa, an yi amfani da "vinsa resin" don inganta ƙarfin simintin. jima'i. Samfurin binciken kimiyya na hakika shine wakilin rage ruwa na "Pozzolitn" (Pozzolitn), wanda EW Scxiptrt na MasterBuilder na Amurka ya yi nasarar yin bincike da ƙera shi a cikin 1935, wanda galibi ya ƙunshi lignosulfonate a cikin ruwa mai sharar ruwa. A cikin 1937, Amurka ta ba da haƙƙin mallaka na farko don wakili na rage ruwa a tarihi. A cikin 1954, rukunin farko na matakan gwaji donkankare admixturesaka tsara.
A hukumance amfani dakankare admixturesa kasata a cikin 1950s. A lokacin, an gabatar da rosin saponified air-entraing agent wanda kwararru daga tsohuwar Tarayyar Soviet suka kirkira. An yi amfani da ita a Sabuwar Tashar Tianjin Tanggu, gadar kogin Wuhan Yangtze da kuma Tafkin Foziling, kuma an samu wasu sakamako. Daga baya, simintin robobi ta amfani da ruwan sharar ɓangaren litattafan almara daga yin takarda sulfite da sharar da zuma daga masana'antar sukari kamar yadda aka yi amfani da albarkatun ƙasa. An fara amfani da kayan maye ma daga nan.
A ci gaba da aikace-aikace nakankare admixturesyana da mahimmanci na dogon lokaci. Ƙarfafa haɓakawa da haɓaka aikace-aikacenkankare admixtureshanya ce mai mahimmanci don haɓaka ci gaban kimiyya na masana'antar gine-gine.
A cikin tsarin gine-gine na ayyukan gine-gine, yin amfani da kayan ado na iya inganta yanayin gine-gine yadda ya kamata, sauƙaƙe amfani da kayan aikin injiniya daban-daban, rage yawan ma'aikatan gine-ginen da suka dace, da tabbatar da ingancin aikin. Bugu da ƙari, ana iya amfani da shi a wasu yanayi masu tsanani. Nasarar kammala ayyukan gini a cikin muhalli.
A kankare admixture iya muhimmanci gajarta tabbatarwa lokaci bayan gina aikin, game da shi speeding up da demoulding gudun na aikin, yin formwork juya da sauri, kuma yana da gagarumin gudun-up sakamako a kan gaba ƙarfafa tensioning da shearing, yin. duk lokacin gina aikin. sosai taqaitaccen. A lokaci guda, ƙari nakankare admixturesHakanan zai iya inganta ingantaccen aikin simintin gabaɗaya, da haɓaka ƙarfinsa, ƙarfinsa, juriyar sanyi, da rashin ƙarfi.
Bugu da ƙari, zai iya inganta haɓakar kankare a lokacin da ya bushe sosai da kuma kaddarorin da ke gudana kafin ƙarfafawa. Idan aka yi amfani da siminti daidai wajen aikin ginin, to yawanci ba zai yi wani tasiri a kan ingancin ginin siminti ba, haka nan kuma yana iya rage yawan amfani da siminti da wasu kayan taimako iri-iri a karkashin tsarin kimiyya, da rage yawan amfani da kayan taimako na siminti ba wai kawai ceton albarkatun zamantakewa ba ne, amma har ma yana adana farashin gine-gine na tsari, kuma yana da tasiri mai kyau akan matakai na gaba. Tsarin tamping da troweling yana ba da dacewa.
Lokacin aikawa: Oktoba-31-2022
