...Shunxiang Wang; Xingxun Fu; Zhihai He; Mingzhi Guo; Chaofeng Liang Calcium sulfoaluminate ( CSA ) cement and Portland cement (CSA–PC) can form blends with excellent performance. Adding cellulose ethers (CEs) can further adjust the macroscopic and microscopic properties of the blends. However...

... on hydration of Portland cement ( OPC ), C₃A (tricalcium aluminate, Ca₃Al₂O₆)−gypsum and pure C₃S (tricalcium silicate, Ca₃SiO₅) and on precipitation of synthetic calcium silicate hydrates (C−S−H) were studied by means of calorimetry...

...Bilguun Mend; Young Jun Lee; Do-Young Kwon; Jeong-Hwan Bang; Yong Sik Chu Hexavalent chromium in Portland cement poses significant health risks and contributes to environmental pollution. Traditional reduction methods rely on costly, resource-intensive reducing agents derived from primary raw...

... decreased autogenous shrinkage at dosages of 0.2, 0.3 and 0.4%. autogenous shrinkage cementitious materials compressive strength Portland cement superabsorbent polymer V₀ real value of compressive strength or autogenous shrinkage of a sample with certain dosage...

...Anera Kazlagić; Dietmar Stephan; Markus Ostermann; Antonio Possolo; Jochen Vogl This study uses conventional ⁸⁷Sr/⁸⁶Sr and ¹⁴³Nd/¹⁴⁴Nd isotope and interelement ratios of Ca, Sr, K, Mn, Mg and Ti as fingerprints for provenancing ordinary Portland cements...

..., which clearly demonstrates the necessity of using the control-stress mode for the study of TDVB with a controlled-stress rheometer, a sample of Portland cement (PC) paste was tested for transitory studies, comparing results obtained with both control modes (Figure 1). The rheometer used for this test...

...Qifeng Lyu; Anguo Chen; Pengfei Dai Preventing the corrosion of cementitious materials in acidic environments is crucial for the safety and durability of infrastructure. The corrosion of specimens of ordinary Portland cement (OPC) and metakaolin-based geopolymer (MKG) in 1 mol/l nitric acid...

... portland cement temperature testing Using ground-penetrating radar (GPR) to estimate the thickness and moisture content of a pavement layer is a fast, economical way to conduct road surveys more effectively without affecting the road structure or disturbing traffic. The dielectric constant...

...Aldo F. Sosa Gallardo; John L. Provis Alternating current impedance spectroscopy (ACIS) was used to assess the effect of different sand, anhydrite and water contents on the electrochemical response of Portland cement paste in the early stages of hydration. Potential factors that may affect...

..., the polymerisation of AMPS, AM and MA was successfully initiated by APS to produce polymer retarder PID-1. The reaction process and molecular structure formula are shown in Figure 2 . Figure 1. Infrared spectrum curve of polymer retarder PID-1 compressive strength microstructure Portland cement...

... oxide (K₂O) 1.10 Sodium oxide (Na₂O) 0.167 Sulfur trioxide (SO_{3) 1.54 Loss on ignition 1.36 18 07 2021 07 10 2021 ICE Publishing: All rights reserved 2021 admixtures fineness Portland cement Bridge, port and dam engineering}...

...), with a median particle size of 0.46 mm and no fines included, was used in the experiments. This sand is classified as poorly graded based on the unified soil classified system. Type I/II Portland cement (ASTM, 2019a) with a specific gravity of 3.15 was used as the cementing agent for the cement-treated...

... on the physico-mechanical and dynamic properties of cement mortars. Portland cement was partially substituted by nanostructured MWCNTs (0.2, 0.4, 0.6, 0.8 and 1.0 wt%), then NS (2, 4, 6, 8 and 10 wt%) and finally both MWCNTs and NS in different ratios. The physico-mechanical and dynamic properties...

...) were purchased from VCN Materials Co., Iran. The diameter and length of MWCNTs were in the range 20–30 nm and 5–10 μm, respectively. The cement used was ordinary Portland cement type 2, complying with the requirements of ASTM C150 (ASTM, 2016a). To prepare the MWCNT–magnetite hybrid, a certain...

... of calcium aluminium silicate hydrate (C–A–S–H) were added to Portland cement systems. It was found that, with the addition of 1%, 3% and 5% C–A–S–H seeds, the hydration process was brought forward by about 2 h, 3 h and 7 h, the initial setting time was reduced by 16.4%, 25.5% and 34.5%, and the final...

... clays Portland cement pozzolans Cement is often regarded as the primary material of the construction industry, making the production of cement one of the most energy-intensive industrial sectors and also one of the largest contributors to carbon dioxide (CO_{2) emissions and air pollution}...

... ICE Publishing: All rights reserved 2019 adsorption compressive strength Portland cement II C x S y H z + x C O 2 → x CaC O 3 + y S H t + ( z − y t ) . n H 2 O Various carbonation experiments have been...

...Harsha Praneeth Pavani; Tezeswi Tadepalli; Ashish Kumar Agrawal Portland pozzolana cement ( PPC) and ordinary Portland cement (OPC) OPC-53 grades of cement are commonly used in India. The thermal responses of these types of Portland cement (PC) differed upon analysing the compressive strengths...

...Qi Zhang; Guang Ye On the material level, the deterioration of ordinary Portland cement (OPC) paste at elevated temperature is attributed to chemical transitions and microstructural cracking. However, few studies on the quantitative characterisation of the degradation process of OPC paste have been...

...Julian Johannes Wolf; Daniel Jansen; Friedlinde Goetz-Neunhoeffer; Jürgen Neubauer Ternary systems on the basis of calcium sulfoaluminate (CSA), ordinary Portland cement (OPC) and anhydrite are known for their rapid setting and hardening properties, which are mainly attributed to the formation...