The influence of superplasticiser on mechanical, transport
Fig. 7 showed that the use of SP significantly reduced the foam concrete's capillary sorption, but the use of 1.1% SP recorded the minimum capillary sorption. At 24 hr, the reduction in sorption was evident by the use of small amounts of SP (0.25% and 0.40%) where the reduction at 28 days was 26.5% and 45.7% respectively compared to the
Superplasticizer - an overview | ScienceDirect Topics
Superplasticizers (SPs) can strongly influence concrete rheology: the admixture of an SP can improve flowability of concrete. Alternatively, at the same flowability requirement, the water/cement (w/c) ratio can be reduced to improve the strength and durability of concrete (Kwan and Fung, 2012 ).
Effect of Superplasticizer on Workability and Properties
This research examined the effect of superplasticizer on workability and properties of self-compacting concrete (SCC). Three types of superplasticizers Conplast SP 561, Conplast SP 430 and Conplast SP 264 at different percentages (0, 10, 20 and 30%) with the same water cement ratio of 0.3, with M30 grade of concrete.
Superplasticizer
Superplasticizer. Superplasticizers ( SPs ), also known as high range water reducers, are additives used in making high strength concrete. Plasticizers are chemical compounds that enable the production of concrete with approximately 15% less water content. Superplasticizers allow reduction in water content by 30% or more.
Use of Water Reducers, Retarders, and Superplasticizer
The use of WRA is defined as Type A in ASTM C 494. WRA affects mainly the fresh properties of concrete by reducing the amount of water used by 5% to 12% while maintaining a certain level of consistency, measured by the slump as prescribed in ASTM C 143-90. The use of WRA may accelerate or retard the initial setting time of concrete.
- Can superplasticizers improve self-compacting concrete workability?
- Self-compacting concrete workability is usually ensured by the addition of superplasticizers in the mixture. The effects of some properties of superplasticizers have been investigated by many researchers.
- Does superplasticizer admixture improve concrete performance?
- This paper outlines an experimental study that measures the effects of superplasticizer admixture on proprieties of concrete. However, Superplasticizers are the most important admixtures enhancing concrete performance.
- Does superplasticizer admixture affect rheological properties of self-compacting concrete?
- The influence of superplasticizers on cement paste, and on rheological and mechanical properties of self-compacting concrete, are also discussed. Moreover, the effect of dry extract of superplasticizer admixture on the behavior of concrete is included. 8.1. Introduction
- What is the flow of superplasticizer on concrete?
- The flow of 0.5% superplasticizer on concrete is illustrated in Fig. 8.10. Concrete without this admixture appears stiff, while concrete containing the superplasticizer flows like a liquid . Figure 8.10. Effect of superplasticizer on concrete: (A) without superplasticizer and (B) with superplasticizer.
- What is the strength of concrete based on a superplasticizer?
- With the addition of 1.2% of total cementitious weight, the greatest compressive strength was obtained was 50.68 MPa. As a water lowering agent, the superplasticizer enhanced the strength and workability of the concrete (Olowofoyeku et al., 2019). ... This book presents solutions for optimizing sustainable concrete fabrication techniques.
- Why do we use a superplasticizer in plastic concrete?
- The slightly lower strength obtained might be because of plastic's hydrophobic material. Therefore, a superplasticizer was added to improve the workability and compressive strength of the optimal plastic concrete. Naphthalene sulfonate formaldehyde was employed as a superplasticizer.
