Dị ka isi ihe nkwụnye nke putty, ọnụ ọgụgụ nke redispersible latex ntụ ntụ na-enwe mmetụta na ike njikọ nke putty.Ọgụgụ 1 na-egosi mmekọrịta dị n'etiti ọnụ ọgụgụ nke redispersible latex ntụ ntụ na njikọ ike. Dị ka a pụrụ ịhụ site na Figure 1, na mmụba nke ego nke ntụ ntụ latex na-emegharị ọzọ, ike nkekọ ji nwayọọ nwayọọ na-abawanye.Mgbe ọnụ ọgụgụ nke latex ntụ ntụ dị ntakịrị, ike njikọ na-abawanye na ụba nke ntụ ntụ latex.Ọ bụrụ na usoro onunu ogwu nke emulsion ntụ ntụ bụ 2%, ike nkekọ ruru 0182MPA, nke na-ezute ọkọlọtọ mba nke 0160MPA.Ihe kpatara ya bụ na uzuzu latex hydrophilic na mmiri mmiri mmiri nke nkwusioru ciment na-abanye n'ime pores na capillary nke matrix, ntụ ntụ na-emepụta ihe nkiri na pores na capillaries ma na-agbanyesi ike n'elu matrix, si otú a na-eme ka ọ dị mma. ike ijikọ n'etiti ihe simenti na matriks [4].Mgbe ewepụrụ putty na efere ule, enwere ike ịhụ na mmụba nke ntụ ntụ latex na-eme ka adhesion nke putty na mkpụrụ.Otú ọ dị, mgbe ọnụ ọgụgụ nke latex ntụ ntụ dị n'elu 4% , mmụba nke ike njikọ na-ebelata.Ọ bụghị naanị ntụ ntụ latex redispersible, kamakwa inorganic ihe ndị dị ka ciment na nnukwu calcium carbonate na-enye aka na bonding ike nke putty.
The mmiri na-eguzogide na alkali eguzogide nke putty bụ ihe dị mkpa ule index na-ekpe ikpe ma putty ike ga-eji dị ka mmiri na-eguzogide mgbidi n'ime ime ma ọ bụ mputa mgbidi putty.Fig. 2 nyochaa mmetụta nke ego nke re-dispersible latex ntụ ntụ na mmiri na-eguzogide nke putty.
Dị ka a pụrụ ịhụ site na foto 2, mgbe ọnụ ọgụgụ nke latex ntụ ntụ na-erughị 4%, na-abawanye ụba nke uzuzu latex, ọnụ ọgụgụ ntinye mmiri na-egosi ọnọdụ ala.Mgbe usoro onunu ogwu ahụ karịrị 4%, ọnụego mmịnye mmiri ji nwayọọ nwayọọ belata.Ihe kpatara ya bụ na simenti bụ ihe na-ejikọta na putty, mgbe ọ dịghị redispersible latex ntụ ntụ na-agbakwunyere, e nwere nnukwu ego nke voids na usoro, mgbe redispersible latex ntụ ntụ na-agbakwunyere, na emulsion polymer kpụrụ mgbe re-agbasasị nwere ike condense n'ime a. ihe nkiri na putty voids, mechie oghere na putty usoro, na-eme ka putty mkpuchi na scraping na-etolite a denser film n'elu mgbe ihicha, si otú ahụ n'ụzọ dị irè na-egbochi mmiri infiltration, belata ọnụ ọgụgụ nke mmiri absorption, nke mere na ya enwekwukwa. mmiri na-eguzogide.Mgbe usoro onunu ogwu nke latex ntụ ntụ ruru 4%, na redispersible latex ntụ ntụ na redispersible polymer emulsion nwere ike ihu ọma jupụta voids na putty usoro kpamkpam na-etolite a zuru ezu na ok film, otú ahụ, ọchịchọ nke mbelata nke mmiri absorption nke putty. na-adị ire ụtọ na mmụba nke oke ntụ ntụ latex.
Site n'ịtụle ihe oyiyi SEM nke putty mere site n'ịgbakwunye redispersible latex ntụ ntụ ma ọ bụ na ọ bụghị, enwere ike ịhụ na na Fig. 3 (a) , ihe ndị na-emepụta ihe na-ejikọtaghị ya n'ụzọ zuru ezu, e nwere ọtụtụ ihe efu, na oghere ndị ahụ adịghị ekesa nke ọma. ya mere, ike nkekọ ya adịghị mma.Ọnụ ọgụgụ dị ukwuu nke oghere dị na usoro ahụ na-eme ka mmiri dị mfe ịbanye, ya mere ọnụ ọgụgụ ntinye mmiri dị elu.Na Fig. 3 (b) , na emulsion polima mgbe re-dispersing nwere ike ihu ọma jupụta voids na putty usoro na-etolite a zuru ezu film, nke mere na inorganic ihe na dum putty usoro nwere ike bonded ọzọ kpamkpam, na ihu ọma adịghị. nwere oghere, ya mere nwere ike ibelata ntinye mmiri putty.N'ịtụle mmetụta nke latex ntụ ntụ na-ejikọta ike na mmiri na-eguzogide mmiri nke putty, ma na-atụle ọnụahịa nke ntụ ntụ ntụ ntụ, 3% ~ 4% nke ntụ ntụ ntụ ntụ dabara adaba. Mmechi redispersible latex ntụ ntụ nwere ike imeziwanye ike njikọ nke putty.Mgbe usoro ọgwụgwọ ya bụ 3% ~ 4%, putty nwere ike njikọ dị elu na ezigbo mmiri na-eguzogide
Oge nzipu: Jul-19-2023