Accelerating admixtures maka ihe bụ ihe mgbakwunye kemịkalụ nke a na-eji mee ngwa ngwa ntọala na usoro siri ike nke ihe. Ngwakọta ndị a bara uru karịsịa na oyi na-atụ ma ọ bụ n'ọnọdụ ebe ọ dị mkpa ka edozi ngwa ngwa ngwa ngwa, dị ka n'ihe gbasara nrụzi mberede ma ọ bụ ọrụ ihe owuwu oge.

Enwere isi ihe abụọ na-eme ngwangwa admixtures maka ihe: chloride-based and non-chloride-based. Admixtures dabere na chloride, nke na-enwekarị calcium chloride ma ọ bụ sodium chloride, bụ ihe mgbakwunye na-eme ngwa ngwa na-adịkarị ma dị irè. Otú ọ dị, n'ihi ike ha nwere ime ka nrụrụ aka nke nchara nchara, a ga-eji ha mee ihe na kọmpụta na-adịghị agbake ma ọ bụ n'ọnọdụ ebe a na-echekwa nkwado ahụ nke ọma. Mgbakwụnye ngwa ngwa na-abụghị chloride, nke na-enwekarị calcium nitrate ma ọ bụ calcium formate, bụ ihe ọzọ dị nchebe ma enwere ike iji ya mee ihe na kọmpụta siri ike.

Otu esi arụ ọrụ ngwa ngwa Admixtures

Na-arụ ọrụ ngwa ngwa admixtures site n'ịba ụba nke mmeghachi omume kemịkalụ nke na-eme n'etiti ciment na mmiri na ngwakọta ihe. Mmeghachi omume a, nke a maara dị ka hydration, bụ ihe na-eme ka ngwakọta ahụ sie ike ma nweta ume.

Mgbe accelerating admixture na-agbakwunyere na ihe ngwakọta, ọ na-eme dị ka ihe na-akpali akpali, na-eme ka usoro hydration dị ngwa ma na-ekwe ka ihe ahụ na-edozi ma sie ike ngwa ngwa. Usoro a kapịrị ọnụ nke accelerating admixtures na-arụ ọrụ dịgasị iche dabere n'ụdị admixture eji. Ihe mgbakwunye chloride na-arụ ọrụ site na ibelata ebe mmiri na-ekpo ọkụ na ngwakọta ihe, na-enye ya ohere ịtọ ma sie ike na obere okpomọkụ. Admixtures na-abụghị chloride na-arụ ọrụ site n'ịkwalite nhazi calcium silicate hydrate (CSH) gel, nke bụ isi ihe na-ahụ maka ike nke ihe.

Uru nke ime ngwa ngwa Admixtures

1. Ntọala ọsọ ọsọ na ime ka ike sie ike

Ihe bụ isi uru nke ime ngwa ngwa admixtures maka ihe bụ na ha na-eme ka nhazi na sie ike nke ngwakọta ahụ ngwa ngwa. Nke a na-enye ohere maka oge owuwu ngwa ngwa na imecha ngwa ngwa nke ọrụ nwere mmetụta oge.

2. Arụmọrụ ihu igwe oyi emelitere

Accelerating admixtures na-aba uru karịsịa na ọnọdụ ihu igwe oyi, ebe ihe nwere ike iwe ogologo oge iji tọọ ma kwesie ike. Site n'ịkwalite usoro hydration ngwa ngwa, ihe mgbakwunye ndị a na-enye ohere ka a wụsa ihe ma tinye ya na obere okpomọkụ.

3. Enwetara Ike

Na mgbakwunye na ịme ngwa ngwa ntọala na usoro siri ike, ụfọdụ admixtures na-eme ngwa ngwa nwekwara ike imeziwanye ike nke ihe a rụchara. Nke a bụ n'ihi na ha na-agba ume ka e guzobe CSH gel, nke bụ isi ihe na-ahụ maka ike nke ihe.

4. Mbelata ọnụ ahịa

Iji ngwa ngwa admixtures nwere ike inye aka belata ọnụ ahịa ihe owuwu ụlọ site n'ịkwalite oge ihe owuwu na ikwe ka arụcha ọrụ ngwa ngwa. Nke a nwere ike ịkpata ego n'ụgwọ ọrụ yana mmefu ndị ọzọ metụtara ihe owuwu.

Oke nke ngwa ngwa Admixtures

1. Ihe ize ndụ corrosion

Iji ngwa ngwa dabere na chlorideadmixturesna ihe mesiri ike nwere ike ịbawanye ohere nke corrosion nke nchara nchara. Nke a nwere ike imebi ihe owuwu ihe ma mee ka nrụzi dị oke ọnụ.

2. Mbelata ịrụ ọrụ

Ịgbakwunye admixture na-agba ọsọ na ihe nwere ike ibelata ọrụ ya, na-eme ka ọ sie ike ịgwakọta na wụsa. Nke a nwere ike ịkpatakwu ụgwọ ọrụ na akụrụngwa.

3. Ndụ shelf dị oke

Admixtures na-eme ngwa ngwa nwere ndụ nchekwa dị oke ma nwee ike tufuo arụmọrụ ha ka oge na-aga. Nke a nwere ike ime ka ọ dị mkpa ka ịgbakwunye admixture ọzọ na ngwakọta ihe, nke nwere ike ịbawanye ụgwọ.

4. Enwere ike ịgbawa

Ịme ngwa ngwa admixtures nwere ike ime ka kọnkịtị ịtọ ma sie ike ngwa ngwa, nke nwere ike ịbawanye ohere nke ịgbawa ma ọ bụrụ na agwọghị ngwakọta ahụ nke ọma ma gbasie ike.

Mmechi

Accelerating admixtures maka ihe bụ ngwá ọrụ dị irè maka ime ngwa ngwa ntọala na usoro siri ike nke ihe. Ha bara uru karịsịa na okpomọkụ dị jụụ na ọrụ ihe owuwu oge, na-enye ohere maka oge mmecha ngwa ngwa yana belata ụgwọ ọrụ. Otú ọ dị, iji ihe ndị na-emepụta ihe na-eme ka chloride na-emepụta ihe na-emesi ike nwere ike ime ka ohere nke corrosion dịkwuo elu, na ihe ndị na-abụghị chloride nwere ike ibelata ọrụ nke ngwakọta. Ngwakọta ngwa ngwa na-enwekwa ndụ nchekwa dị oke ma nwee ike ịbawanye ohere nke ịgbawa ma ọ bụrụ na agwọghị ngwakọta ahụ nke ọma ma kwalite ya. N'agbanyeghị oke ndị a, admixtures na-agba ọsọ ka bụ ngwá ọrụ bara uru maka ndị ọrụ nkwekọrịta na ndị injinia na-achọ ime ka usoro ihe owuwu dị ngwa ma melite arụmọrụ nke ihe owuwu.