1. Nyob rau lub caij ntuj sov, qhov kub yog feem ntau siab heev, tshwj xeeb tshaj yog tom qab los nag. Cov teeb meem feem ntau nrog cov ntoo pem teb zoo tib yam yog thermal expansion thiab txias shrinkage. Nyob rau hauv qhov kub thiab txias, cov dej hauv cov ntoo yuav evaporate thiab nqus dej noo tom qab los nag, ua rau lub ntim ntim, ua rau cov pob qij txha hauv pem teb nce thiab ntsws, ua rau deformation. Txawm li cas los xij, txheej txheej ntawm sab nraum zoov yas ntoo flooring muaj cov txheej txheem tshwj xeeb uas tuaj yeem cais tawm feem ntau ntawm cov kab hluav taws xob ultraviolet, uas tuaj yeem zam kev deformation.
2. Thermal expansion yog ntau, yog li xyuam xim rau qhov sib txawv ntawm cov plag tsev thaum txhim kho cov yas ntoo. Thaum txhim kho, nws yog ib qho tsim nyog yuav tau xaiv qhov tsim nyog qhov kev ncua deb thiab kev teeb tsa raws li thaj chaw ib puag ncig thaum lub sijhawm ntawd, thiab kev xaiv cov ntaub pua tsev hauv qab no yuav tsum ua raws li ib puag ncig.
3. Qee cov tuam txhab lag luam nrog cov cuab yeej siv tsis zoo yuav txiav cov ces kaum hauv cov txheej txheem tsim khoom, lossis lawv cov cuab yeej siv hauv av tsis ncav cuag cov dej tsis muaj pov thawj, yog li lawv tsis tuaj yeem tiv thaiv ultraviolet rays. Tom qab thermal expansion, nws yooj yim rau deform. Yog li ntawd, thaum xaiv cov khoom siv ntoo yas, peb yuav tsum xaiv cov tuam txhab muaj zog.
4. Thaum qhov zoo ntawm cov yas ntoo flooring zoo heev thiab cov txheej txheem kev tsim kho yog mature, feem ntau tsis muaj kub deformation. Tau kawg, qee qhov lwm yam tsis tuaj yeem zam tau, xws li thermal expansion thiab contraction ntawm sab nraum zoov yas ntoo flooring tshwm sim los ntawm underground pipeline nteg, pipeline dej txias, thiab cua sov.