Gwajin haɗaka, gwajin porosity

In kankare Kimiyyar kayan aikin injiniya da injiniyanci, haɗawa da porosity dabaru ne masu mahimmanci guda biyu waɗanda ke shafar kaddarorin jiki da na injiniya kai tsaye, dorewa da rayuwar sabis na kankare. Kamar yadda "kayan yaji" a cikin kankare dabara, admixtures iya muhimmanci inganta workability, ƙarfi, impermeability, daskare-narke sake zagayowar juriya da sauran Properties na kankare; da porosity, a matsayin maɓalli na maɓalli na microstructure na kankare, yana da alaƙa kai tsaye da Permeability, shayar ruwa da kaddarorin karko na kankare. Wannan labarin zai bincika zurfin mahimmanci, hanyoyin ganowa, abubuwan da ke haifar da tasiri da aikace-aikace a cikin aikin injiniya daga ma'auni guda biyu na gwajin admixture da gwajin porosity.

Gwajin haɓakawa: “mai gyara mai kyau” na aikin kankare

Admixtures, kamar yadda sunan ke nunawa, ƙananan abubuwa ne da aka ƙara yayin aikin haɗakar da kankare don haɓaka kaddarorin siminti ko biyan takamaiman buƙatun gini. Admixtures na yau da kullun sun haɗa da wakilai masu rage ruwa, abubuwan haɓaka iska, masu hana ruwa gudu, wakilai masu ƙarfi da wuri, da sauransu. Saboda haka, gano admixtures ba wai kawai yana da alaƙa da kula da ingancin kankare ba amma har ma da muhimmiyar hanyar haɗin gwiwa don tabbatar da amincin aikin.

Kankare mai kumfa

Hanyoyin gwaji da ma'auni

Gwajin haɗakarwa yawanci ya haɗa da abubuwa uku: kaddarorin jiki, abubuwan sinadarai da tasirin aiki. Kayan aiki na al'ada na iya auna kaddarorin jiki kai tsaye kamar yawa, lafiya, da sauransu; Abubuwan sinadarai kamar ƙimar pH, ingantaccen abun ciki, abun ciki mai aiki mai aiki, da sauransu, suna buƙatar taimakon hanyoyin nazarin sinadarai; da kuma tasirin aiki, irin su rage yawan ruwa, saita canje-canjen lokaci, da dai sauransu. Wannan yana buƙatar kimantawa ta hanyar gwadawa. A duniya, kamar Amurka ASTM, Turai EN matsayin da Sin GB ma'auni, da dai sauransu, sun tsara cikakken fasaha bayani dalla-dalla don gwada admixtures.

Abubuwan da ke tasiri da kuma kula da inganci

Ayyukan abin haɗawa yana shafar abubuwa iri-iri, gami da abubuwan da ke tattare da sinadarai, adadin sa, hanyar haɗawa, da hulɗa tare da sauran abubuwan da aka gyara. Sabili da haka, a cikin aikace-aikacen da ake amfani da su, ya zama dole don zaɓar nau'in da ya dace da nau'in nau'i na admixtures bisa la'akari da cikakkun bayanai kamar buƙatun injiniya, yanayin yanayi, halayen albarkatun kasa da sauran dalilai. A lokaci guda kuma, an kafa tsarin kula da ingancin inganci don tabbatar da ingancin abubuwan da aka haɗa da su sun tabbata kuma amintacce kuma don guje wa sauye-sauye a cikin aikin kankare sakamakon matsalolin ingancin admixture.

Gwajin rashin ƙarfi: 'gilashin gani' na ƙananan ƙananan abubuwa

Porosity wani muhimmin ma'auni ne wanda ke kwatanta halaye na tsarin pore na ciki na kankare, wanda ke nuna nauyin kankare. Girman da rarraba porosity kai tsaye yana rinjayar permeability, ƙarfi, karko da sauran kaddarorin kankare. Saboda haka, daidai auna porosity na kankare yana da babban mahimmanci don kimanta ingancin kankare da haɓaka ƙirar haɗin gwiwa.

Hanyoyin gwaji da fasaha

Akwai hanyoyin gwaji daban-daban na porosity, gami da hanyar kutsawa ta mercury, hanyar adsorption gas, hanyar nazarin hoto, da sauransu. Daga cikinsu, ana amfani da mercury porosimetry sosai saboda girman ma'aunin sa da fa'idar aikace-aikace. Wannan hanya tana danna ruwa mercury a cikin samfurin kankare kuma yana amfani da ikon mercury na ruwa don cika pores a ƙarƙashin matsi daban-daban don ƙididdige halayen porosity da pore rarraba simintin. Bugu da kari, tare da haɓaka fasahar kwamfuta da fasahar sarrafa hoto, hanyar tantance hotuna a hankali ta zama hanyar gwajin porosity mai sauri da mara lalacewa.

Dangantaka tsakanin porosity da kankare Properties

Porosity yana da alaƙa da alaƙa da kaddarorin kankare daban-daban. Ƙananan porosity, mafi girma da yawa na kankare kuma mafi kyawun ƙarfinsa, rashin ƙarfi, karko da sauran kaddarorin. Koyaya, ƙananan porosity na iya ƙara ɓarnawar siminti kuma yana shafar juriyar faɗuwar sa. Saboda haka, a cikin kankare mix zane, shi wajibi ne don comprehensively la'akari da ma'auni tsakanin porosity da daban-daban Properties na kankare cimma mafi kyau duka hade da kankare Properties.

Aikace-aikace a cikin aikin injiniya

A cikin bincike da aikace-aikacen admixtures da porosity, aikin injiniya wuri ne mai mahimmanci don gwada ra'ayoyin. Ta hanyar bincike na babban adadin aikin injiniya misalai, za mu iya gano cewa m selection na admixtures da kuma tsananin iko da sashi, hade da kimiyya mix rabo zane, na iya rage porosity na kankare da kuma inganta compactness da durability na kankare. Alal misali, a wuraren sanyi, ta hanyar ƙara adadin da ya dace na ma'aikatan da ke motsa iska, za a iya shigar da ƙananan kumfa a cikin simintin don rage lalacewar simintin da ke haifar da daskarewa; yayin da a cikin babban ginin siminti mai girma, yin amfani da retarder da ingantaccen wakili mai rage ruwa zai iya sarrafa lokacin saiti da aikin siminti yadda ya kamata, da rage fashewar zafin jiki da raguwa a cikin simintin.

Mai ba da Kankare Admixture

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