In a different study, Abalaka [11] reported that the initial and final setting time increased with increase in the quantity of sugar.A continuous decrease in the initial and final setting time was recorded at a sugar content of 0.08% and more. Zhang et al. [12] investigated the effect of aliphatic sugar alcohols and sucrose on the setting time of ordinary Portland cement …
Phosphonates are widely used components of retarder and dispersant formulations in concrete and mortar. In this study, 11 different phosphonate retarders were analyzed for their retarding performance in ordinary Portland …
Hypothesis 1: CSA will require reduced curing periods compared to OPC. • Extended curing in RH is not required for CSA cement mixes beyond 3 days. o Samples cured for 2- 3 days reached similar compressive strengths, slightly lower amount of hydration products and slight increases in drying shrinkage.
In this study, experiments were performed on the applicability of mortars and concretes based on calcium sulfoaluminate (CSA) binders to …
Effect of gypsum on cement by preparing four different batches of Ordinary Portland Cement (OPC) using same quality clinker, maintaing SO3 level of cement 2 +/- 0.05 % and maintaining Blaine value ...
They found that the wear resistance of MPC concrete was better than that of OPC concrete under the same strength. Hence, MPC can be used as a road repair or tunnel spraying material. ... to be less than 2.09%. In addition, the volume stability of MPC is affected by many factors, including the M/P ratio, retarder content, water-cement ratio, and ...
cement (OPC) can be used for various application fields like rapid setting, rapid ... As retarder chemically pure citric acid (abbreviated in the figures as "Ret") was used.
Key Takeaways • OPC and PPC cement are crucial for construction, influencing structure durability and strength. • Ordinary Portland Cement (OPC) is versatile, coming in grades like OPC 33, 43, and 53, each with distinct strengths. • …
Thus for M-40 Grade of concrete with OPC per cu.m of concrete on the basis of saturated and surface dry aggregates. Water = 150 kg/m 3 OPC = 375 kg/m 3 Fine Aggregate (sand) ... Specific gravity of Retarder Superplasticizer = 1.15; Addition of …
Gypsum is the set retarder for ordinary portland cement (OPC). Without gypsum, ground clinker exhibits flash setting in a few minutes, due to the rapid hydration of
Calcium sulfoaluminate cement (CSA) blended with ordinary Portland cement (OPC) can be used for various application fields like rapid setting, rapid hardening or expansive cements.
Compressive strengths of OPC paste (0% retarder, w/c = 0.4) and CSA2 cement paste cubes with dosages of retarder varying from 0 to 3%, w/c = 0.4. The effect of citric acid …
For the OPC samples that were treated with a surface retarder, growth is mostly concentrated on the cement part of the surface, not the aggregate. This holds especially true for the samples with the regular limestone aggregate, …
• In depth understanding of cement and SCMs hydration mechanisms and in depth understanding of interactions mechanisms of cement x admixtures (molecular level) • Ability to design …
The efficacy of date kernel powder (DKP) as a retarder in OPC concrete mixes, by replacing cement at percentages ranging from 0.5% to 5%, and its effect of the fresh and hardened properties including the workability, density, setting times, heat of hydration, mechanical and thermal properties are presented.
The composite retarder consisting of 0.5 % tartaric acid and 1.0 % Na 2 CO 3 exhibited the best performance, fulfilling both the setting time and early strength requirements …
In this study, blends of ordinary portland cement (OPC) and calcium sulfoaluminate cement (CSA) were used as 3D- binders (3DPBs). Two organic salts—that is, sodium gluconate (SG) and potassium sodium tartrate (PST)—were selected as retarders to control the setting process of 3DPB.
retarder opc cement. Effects of Saccharide Set Retarders on the Hydration of, January 2010 Effects of Saccharides on Hydration of Ordinary Portland Cement and Pure Tricalcium Sili
DOI: 10.1016/S0892-6875(01)00074-7 Corpus ID: 98620130; A plant investigation into the use of treated phosphogypsum as a set-retarder in OPC and an OPC/fly ash blend @article{Potgieter2001API, title={A plant investigation into the use of treated phosphogypsum as a set-retarder in OPC and an OPC/fly ash blend}, author={Johannes Hermanus Potgieter and …
The setting times of the mixes are found to be lower than that of the value prescribed for ordinary Portland cement (OPC). Borax is used as a setting retarder and a borax content of 0.4 % by mass gives setting times that are …
The primary advantage of CSA cements is that concrete made with CSA instead of portland cement often achieves compressive strengths of in excess of 5000 psi in 24 hours; with CSA's, it's possible to achieve 28 day strength in 24 hours. …
OPC cement (type I), modified cement (type III and type IV), and PCC cement to see how the compressive strength of concrete develops over time with testing periods of 3 days, 7 days, 14 days, and 28 days. The research method used is an experimental study aimed at obtaining a comparison of compressive strength of concrete using OPC and PCC cement.
Chemical admixtures affecting these reactions to produce a delay in the process of cement paste stiffening are termed retarding admixtures or simply retarders. Hence, a retarder is added to a …
On the other hand, the compressive strength of concrete with a retarder is lower than that of concrete without a retarder [28]. The effects of suitable admixture dosage still need further ...
Request PDF | A plant investigation into the use of treated phosphogypsum as a set-retarder in OPC and an OPC/FLY ash blend | This investigation describes the successful substitution of ...
In this study, experiments were performed on the applicability of mortars and concretes based on calcium sulfoaluminate (CSA) binders to facilitate the early strength development of ordinary …
Phosphonates are widely used components of retarder and dispersant formulations in concrete and mortar. In this study, 11 different phosphonate retarders were analyzed for their retarding performance in ordinary Portland cement (OPC) and alite. The interaction of the phosphonates with clinker phases was investigated using calorimetry and pore ...
This study explores a novel application of VC as a retarder for calcium sulfoaluminate cement (CSA). CSA has gained significant research interest for its potential as a low-carbon alternative of ordinary Portland cement (OPC). However, CSA sets very fast, leaving very limited processing time. Experimental studies carried out in this study show ...
OPC paste with a water cement ratio 0.4 to 0.5 was prepared by mixing 500 grams of ordinary Portland cement, a fixed amount of sugar of 0.02% by weight of cement with a combination of different ...