Ochepetsa madzi a polycarboxylic acid amatha kukumana ndi zovuta zambiri pakugwiritsa ntchito bwino. Tsopano tiyeni titchule mavuto omwe amakumana nawo muzogwiritsa ntchito mainjiniya ndi mayankho awo.

Choyamba ndi matope omwe ali mumchenga. Pamene matope a mchenga ali okwera, mlingo wochepetsera msonkho wa polycarboxylic acid wochepetsera madzi umachepetsedwa kwambiri, ndipo kusintha sikukuwonekera pamene zomwe zikuwonjezeka. Yankho: Gwiritsani ntchito mchenga uwu pa konkire wamba wamba; kuwongolera mosamalitsa matope omwe ali mumchenga ndipo amafuna kuti matope azikhala osachepera 2%.

Chachiwiri ndi kusagwirizana pakati pa mchenga ndi polycarboxylic acid kuchepetsa madzi. Pamene gradation, matope, ndi matope omwe ali mumchenga akwaniritsa zofunikira, sasungunuka ndi polycarboxylic acid yochepetsera madzi, ndipo mchenga uli ndi zina Zomwe zimapangidwa ndi mankhwala zimatsutsana ndi kapangidwe ka polycarboxylic acid yochepetsera madzi, ndipo konkire wosakanikirana alibe fluidity. Yankho: Pa mchenga uliwonse womwe umalowa pamalopo, ngati zizindikiro za thupi zili zoyenerera, yesaninso kusakaniza konkire kuti muchotse mchenga wosasungunuka pamalopo. Ndiye konkire slump imfa ndi kudya, amene amafuna madzi kuchepetsa wothandizila Mlengi kuwonjezera slump posungira wothandizila, ndiyeno ntchito pa malo zopangira kuchita retest wa chiŵerengero kusakaniza kusintha kugwa imfa kuti akwaniritse zomanga.

Chomaliza ndi chodabwitsa cha magazi a konkriti. Pansi pa mvula, konkire ya C50 inatsanulidwa ndipo konkire inatsitsidwa kuchokera ku tanka bwino, koma pambuyo pa kugwedezeka konkire, panali magazi ndi tsankho. Yankho: Chepetsani kumwa madzi, onjezerani nthawi yosakaniza, chepetsani 0.1%, kugwedezeka kwa konkire sikumakhetsa magazi, ndikupanga zitsanzo za konkriti ndi mphamvu zopondereza za masiku 28 kuti mufikire mphamvu zamapangidwe.