Evaluation of Absorption Capacity and Spacing of Superabsorbent Polymer Particles in Cement Paste

2019 ◽  
pp. 46-54
Author(s):  
Soushi Yamashita ◽  
Shin-ichi Igarashi
Keyword(s):  
Cement Paste ◽  
Absorption Capacity ◽  
Superabsorbent Polymer ◽  
Polymer Particles

Design of Nutrient Enriched Cement Paste with a Superabsorbent Polymer for the Bio-Based Self-Healing Concrete Development

2020 ◽  
Vol 995 ◽  
pp. 161-167
Author(s):  
Hana Schreiberova ◽  
Josef Fládr ◽  
Karel Šeps ◽  
Alena Kohoutkova
Keyword(s):  
Cement Paste ◽  
Absorption Capacity ◽  
Strength Increase ◽  
Superabsorbent Polymer ◽  
Self Healing ◽  
Water Addition ◽  
Partially Saturated ◽  
Concrete Mix Design ◽  
Significant Strength ◽  
Mixing Water

The application of self-healing concrete for durability enhancement has become a widely studied topic in recent decades. This paper focuses on addition of a superabsorbent polymer (SAP) to bio-based self-healing concrete – a material in which cracks are autonomously sealed by incorporated microorganisms. As previously proposed, the SAP could serve as protection of the microorganisms against the harsh concrete environment and possibly to further enhance the materials autogenous sealing capacity. However, determining the applicable bio-based concrete mix design is not without obstacles as the immense absorption capacity of the SAP is, inter alia, closely related to ions present in the solution. This current study compares different mix designs of cement paste with the nutrients applied in the bio-based concrete and the addition of the SAP in dry and partially saturated states. The paste consistencies are determined, and a number of cement paste specimens is prepared to measure flexural and compressive strengths at 7 and 28 days from casting. The flowability results indicate that the SAP in a dry state absorbs slightly less than 25 g/g SAP of extra mixing water as the final consistency was similar to the reference paste. Further, the results showed that the partially saturated SAP is able to retain a great amount of the liquid throughout the mixing process. In this study, the strengths generally drop by still admissible 20% in the case of the dry SAP and extra water addition, whereas the replacement of mixing water by the partially saturated SAP results in a significant strength increase. These findings indicate that the dosage 0.5% SAP by cement weight in both of the states, dry and saturated, is applicable in the nutrient enriched cement paste from the mechanical perspective, although further work which would describe the absorption and retention mechanisms in depth is needed.

scholarly journals Effective Enhancement of Water Absorbency of Itaconic Acid Based-Superabsorbent Polymer via Tunable Surface—Crosslinking

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2782
Author(s):  
Yong-Rok Kwon ◽  
Jung-Soo Kim ◽  
Dong-Hyun Kim
Keyword(s):  
Itaconic Acid ◽  
Photoelectron Spectroscopy ◽  
Crosslinking Agent ◽  
Absorption Capacity ◽  
Gel Strength ◽  
Superabsorbent Polymer ◽  
Optimal Conditions ◽  
Retention Capacity ◽  
X Ray ◽  
Crosslinking Reactions

A superabsorbent polymer (SAP) was synthesized by copolymerizing itaconic acid and vinyl sulfonic acid. The typically low absorbency of itaconic acid-based SAPs under mechanical loads was improved by introducing surface crosslinking. Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy were used to characterize the synthesis and surface-crosslinking reactions in the SAP. Various conditions for surface-crosslinking reactions, such as the surface-crosslinking solution, content of surface-crosslinking agent, and reaction temperature, were explored and correlated with the gel strength and absorption characteristics of the resulting SAP particles. The distilled water content in the surface-crosslinking solution strongly influenced the absorption capacity of the SAP, but this sensitivity decreased when acetone was used as a co-solvent. Itaconic acid-based SAP that was crosslinked under optimal conditions exhibited centrifuge retention capacity and absorbency under a load of 31.1 and 20.2, respectively.

Quantitative characterisation of absorption capacity and dosage of SAP in cement paste

2016 ◽  
Vol 28 (8) ◽  
pp. 518-528 ◽  
Author(s):  
Ming Li ◽  
Yu-jiang Wang ◽  
Wen-bin Wang ◽  
Qian Tian ◽  
Jia-ping Liu
Keyword(s):  
Cement Paste ◽  
Absorption Capacity ◽  
Quantitative Characterisation

Properties of strain-hardening cement composites with superabsorbent polymer particles

2019 ◽  
Vol 71 (8) ◽  
pp. 437-448 ◽  
Author(s):  
Seok-Joon Jang ◽  
Hyun-Do Yun ◽  
Sun-Woo Kim ◽  
Wan-Shin Park ◽  
Koichi Kobayashi
Keyword(s):  
Strain Hardening ◽  
Cement Composites ◽  
Superabsorbent Polymer ◽  
Polymer Particles

Photoinduced surface crosslinking of superabsorbent polymer particles

2009 ◽  
Vol 111 (5) ◽  
pp. 2163-2170 ◽  
Author(s):  
Steffen Jockusch ◽  
Nicholas J. Turro ◽  
Yoshiro Mitsukami ◽  
Makoto Matsumoto ◽  
Taku Iwamura ◽  
...  
Keyword(s):  
Superabsorbent Polymer ◽  
Polymer Particles

Influences of Superplasticizer on the Interaction between Latex Particles and Cement Grains

2013 ◽  
Vol 687 ◽  
pp. 335-340 ◽  
Author(s):  
Dong Dong Han ◽  
Jin Mei Li ◽  
Wei Deng Chen ◽  
Shi Yun Zhong
Keyword(s):  
Zeta Potential ◽  
Cement Paste ◽  
Adsorption Rate ◽  
Test Results ◽  
Polymer Particles ◽  
Latex Particles

In order to have a better understand on the interaction among superplasticizer, latex and cement grains in the fresh cement paste, the zeta potential and the adsorption of polymer on the cement were investigated in this study. The zeta potential was measured by using the ZetaProbe instrument, and the adsorption rate of latex was analyzed by sedimentation test. The zeta potential results show that the zeta potential of pure cement paste is positive and increasing slightly along the first 30mins; the latex particles can be adsorbed by cement grains, comparing with SAE latex, the adsorption of PAE latex is lower, and PAE latex has a smaller influence on the hydration of cement paste; the presence of superplasticizer can affect the adsorption of polymer particles on the cement; the sedimentation test results show that the presence of PC and NF can reduce the adsorption of latex particles, when the dosage of PC is more than 0.3%, the adsorption rate of latex particles is reduced significantly; when the dosage of NF is 1%, the adsorption rate of latexes is reduced less than that in the case of PC.

scholarly journals Sintesis dan karakterisasi polimer superabsorban dari akrilamida

2018 ◽  
Vol 11 (2) ◽  
pp. 84
Author(s):  
A. Zainal Abidin ◽  
G Susanto ◽  
N.M.T. Sastra ◽  
T Puspasari
Keyword(s):  
Absorption Capacity ◽  
Synthesis And Characterization ◽  
Superabsorbent Polymer ◽  
Ammonium Persulphate ◽  
Surface Contact Area ◽  
Acrylamide Monomer ◽  
Cross Linker ◽  
Short Time ◽  
High Absorption

Synthesis and Characterization of Superabsorbent from Acrylamide Superabsorbent polymer (SAP) is a material that can absorb water in a large amount in a short time. In this research, the polymer has been synthesized from acrylamide monomer (Am) using N,N methylene bisacrylamide (MBA)as a cross-linker and ammonium persulphate (APS) as an initiator. Effects of MBA and APS on the SAP characteristic were studied by varying composition of MBA and APS each of 0.1%-wt, 0.2 %-wt, 0.6 %-wt and 1.0 %-wt. SAP was characterized by measuring its absorption capacity to distilled water. Based on the experiment, the highest absorption capacity for 1 gram SAP is 14.5 gram water. The highest absorption is produced by SAP with APS 0.2 %-wt and MBA 0.6 %-wt. Further studies by using SEM showed that SAP which had high absorption capacity contained a lot of pores with the waving surface. Therefore, the surface contact area between SAP and water is high. Keywords: acrylamide, absorption capacity, superabsorbent polymerAbstrakSuperabsorbent Polymer (SAP) merupakan polimer yang dapat menyerap air dalam jumlah yang sangat banyak. Dalam penelitian ini, polimer tersebut disintesis dari monomer akrilamida menggunakan crosslinker N,N-metilene bisakrilamide (MBA) dan inisiator amonium persulfat (APS). Pengaruh crosslinker dan inisiator terhadap karakteristik SAP dipelajari dengan melakukan variasi komposisi APS dan (MBA) masing-masing sebesar 0,1 %-b, 0,2 %-b, 0,6 %-b, dan 1 %-b. Karakteristik produk SAP dipelajari dengan FTIR untuk menganalisis gugus fungsi yang terbentuk untuk menunjukkan bahwa polimerisasi betul terjadi dan produknya berupa SAP. Pengukuran kemampuan absorpsi SAP terhadap air destilasi menunjukkan bahwa kapasitas absorpsi terbesar yang dihasilkan oleh superabsorbent polymer dari penelitian ini sebesar 14,5 gram air dalam 1 gram produk SAP yang dibuat. Kapasitas terbesar ini dimiliki oleh SAP dengan 0,2 %-b APS dan 0,6 %-b MBA. Studi lebih lanjut dengan SEM menunjukkan bahwa SAP yang memiliki kapasitas absorpsi tertinggi itu mempunyai morfologi permukaan yang berombak dan jumlah pori yang tertinggi sehingga luas permukaan kontak antara SAP dan air juga tertinggi. Kata kunci: akrilamida, kapasitas absorpsi, superabsorbent polymer

scholarly journals Absorption capacity of superabsorbent polymer in cement pastes: a robustness test

2021 ◽  
Vol 54 (1) ◽  
Author(s):  
Shengying Zhao ◽  
Ole Mejlhede Jensen ◽  
Marianne Tange Hasholt ◽  
Xinchun Guan
Keyword(s):  
Absorption Capacity ◽  
Superabsorbent Polymer ◽  
Cement Pastes
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