ဆဲလျူးလိုက်စ်အီသာကိုအသုံးပြုခြင်းနှင့် HEC HEMC HPMC ၏ ရွေးချယ်မှု
This study was conducted using a CEM I 52.5N sample (“Milke®” from HeidelbergCement AG, Heidelberg, Germany). Its properties are presented in Table 1. Composition of the cement was obtained by Q-XRD using a Bruker axs D8 Advance instrument (Bruker, Karlsruhe, Germany) with Bragg–Brentano geometry. Topas 4.0 software was employed to quantify the amounts of individual phases present in the sample by following Rietveld's method of refinement. The amounts of gypsum (CaSO4·2H2O) and hemi-hydrate
Mortar water retention is an important indicator of the stability of the internal components of fresh cement mortar. In order to make the hydration reaction of the gel material fully carried out, the right amount of cellulose ether can keep the water in the mortar for a longer time. In general, the water retention of the slurry increases with the increase of cellulose ether content. The water retention of cellulose ether can prevent the substrate from absorbing too much water too quickly and hinder the water evaporation, thus ensuring that the slurry environment provides sufficient water for cement hydration. In addition, the viscosity of cellulose ether also has a significant effect on the water retention of mortar. The higher the viscosity, the better the water retention.