Nanoscale Polyacrylamide Copolymer/Silica Hydrogel Microspheres with High Compressive Strength and Satisfactory Dispersion Stability for Efficient Profile Control and Plugging

Author(s):  
Zhenbo Li ◽  
Tianyu Zhao ◽  
Wei Lv ◽  
Bo Ma ◽  
Qiaowei Hu ◽  
...  
Alloy Digest ◽  
2019 ◽  
Vol 68 (4) ◽  

Abstract Sandvik APM 2730 is a powder metallurgical alloyed hot-isostatic-pressed high-speed tool steel with abrasive wear resistance and high-compressive strength. This datasheet provides information on composition, physical properties, and elasticity. It also includes information on heat treating and machining. Filing Code: TS-763. Producer or source: Sandvik Steel Company.


Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2911
Author(s):  
Margarida Gonçalves ◽  
Inês Silveirinha Vilarinho ◽  
Marinélia Capela ◽  
Ana Caetano ◽  
Rui Miguel Novais ◽  
...  

Ordinary Portland Cement is the most widely used binder in the construction sector; however, a very high carbon footprint is associated with its production process. Consequently, more sustainable alternative construction materials are being investigated, namely, one-part alkali activated materials (AAMs). In this work, waste-based one-part AAMs binders were developed using only a blast furnace slag, as the solid precursor, and sodium metasilicate, as the solid activator. For the first time, mortars in which the commercial sand was replaced by two exhausted sands from biomass boilers (CA and CT) were developed. Firstly, the characterization of the slag and sands (aggregates) was performed. After, the AAMs fresh and hardened state properties were evaluated, being the characterization complemented by FTIR and microstructural analysis. The binder and the mortars prepared with commercial sand presented high compressive strength values after 28 days of curing-56 MPa and 79 MPa, respectively. The mortars developed with exhausted sands exhibit outstanding compressive strength values, 86 and 70 MPa for CT and CA, respectively, and the other material’s properties were not affected. Consequently, this work proved that high compressive strength waste-based one-part AAMs mortars can be produced and that it is feasible to use another waste as aggregate in the mortar’s formulations: the exhausted sands from biomass boilers.


2011 ◽  
Vol 335-336 ◽  
pp. 1454-1458
Author(s):  
Jing Xian Zhang ◽  
Bi Qin Chen ◽  
Dong Liang Jiang ◽  
Qing Ling Lin ◽  
Zhong Ming Chen ◽  
...  

In the present work, porous HA scaffolds with well controlled pore size, porosity and high compressive strength were prepared by aqueous gelcasting. PMMA beads with different size were used as the pore forming agent. The compositions, microstructure and properties of porous HA bioceramics were analyzed by XRD, SEM, Hg porosimetry etc. The mechanical properties were also tested. For scaffolds with the porosity as 70%, the average compressive strength was 11.9±1.7 MPa. Results showed that glecasting process can be used for the preparation of porous HA biomaterials with well controlled pore size and improved mechanical properties.


2012 ◽  
Vol 24 (37) ◽  
pp. 5123-5123 ◽  
Author(s):  
Hengchang Bi ◽  
Kuibo Yin ◽  
Xiao Xie ◽  
Yilong Zhou ◽  
Neng Wan ◽  
...  

2019 ◽  
Vol 2 (1) ◽  
pp. 1
Author(s):  
Agil Dwi Krisna ◽  
Sigit Winarto ◽  
Ahmad Ridwan

Concrete has the disadvantage of having a low tensile strength and convincing brittle beams with steel inscriptions to anticipate. In this study, the concrete mixture was given additional bagasse and additives of cycacim bonding. This addition was carried out to study and study the effect of bagasse on the compressive strength of normal k300 concrete by replacing bagasse by 0%, 5%, 10% and 15% in compressive loads. Compressive strength specimens in the form of cubes with a size of 15 cm x 15 cm x 15 cm. Testing is done after 28 days. Concrete with increased bagasse of 5% is better able to produce high compressive strength values than others. The addition of bagasse resulted in an average compressive strength of 5%, 229.64 kg / cm2, 10%, 190.35 kg / cm2, 15%, 160.87 kg / cm2.Beton mempunyai kelemahan yaitu mempunyai kuat tarik yang rendah dan bersifat getas sehingga beton diberi tulangan baja untuk mengantisipasinya. Pada penelitian ini, campuran beton diberi bahan tambahan ampas tebu dan zat additif sikacim bonding adhesive. Penambahan ini dilakukan untuk mempelajari dan mengetahui pengaruh ampas tebu terhadap kuat tekan pada beton mutu normal k300 dengan penambahan ampas tebu sebesar 0%, 5%, 10% dan 15% pada beban tekan. Benda uji kuat tekan berbentuk kubus dengan ukuran 15 cm x 15 cm x 15 cm. Pengujian dilakukan setelah 28 hari. Beton dengan penambahan ampas tebu 5% lebih mampu menghasilkan nilai kuat tekan tinggi dari pada yang lainya. Penambahan ampas tebu menghasilakan kuat tekan rata-rata yaitu 5%,229,64 kg/cm2, 10%,190,35 kg/cm2, 15%,160,87kg/cm2.


2010 ◽  
Vol 25 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Shu-ping ZHANG ◽  
Ming-xian LIU ◽  
Li-hua GAN ◽  
Fang-rui WU ◽  
Zi-jie XU ◽  
...  

2010 ◽  
Vol 636-637 ◽  
pp. 155-160 ◽  
Author(s):  
C. Panagiotopoulou ◽  
Glykeria Kakali ◽  
Sotiris Tsivilis ◽  
T. Perraki ◽  
Maria Perraki

In the present work the geopolymerisation of blast furnace slag (GGBS) under varying conditions is being investigated. The experimental comprises the following parts: i) dissolution of slag in alkaline media and the investigation of the effect of the alkali ion (K or Na) on the dissolution of Al+3 and Si4+, ii) synthesis of slag based geopolymers and the investigation of the effect of the Si/Al ratio and the kind of alkaline ion on the development of the compressive strength and iii) characterization of geopolymers by means of XRD, FTIR and SEM/EDS measurements. As it is concluded, blast furnace slag geopolymers exhibit high compressive strength, with the maximum being 112.7±2 MPa. The Si/Al ratio of the starting material is found to affect strongly the development of the geopolymer compressive strength. The microstructure of slag–based geopolymers and the incorporation of Ca in the geopolymer matrix are also discussed.


2018 ◽  
Vol 7 (4.2) ◽  
pp. 5
Author(s):  
Dr Lavanya Prabha.Sa ◽  
Dr Neelamegam ◽  
Vinodhini Sri.R

This paper presents the study to investigate the viability of using copper slag as fine aggregate in cement mortar. Two series of cement mortar mixtures were prepared with different proportion of copper slag at different workability. In the first series, various proportions of copper slag is substituted for sand ranging from 0% to 100% with constant workability. Second series consists of fully replaced copper slag for sand in the cement mortar, which was achieved by maintaining the same workability as that of the control mortar mixture from first series and a control mixture for this new workability with sand as fine aggregate. The strength of twelve trial cement mortar mixtures were tested. The results indicate high compressive strength upto 50% replacement of copper slag, after that the compressive strength decreases with increase in copper slag percentage in cement mortar. The copper slag content in the mortar adversely affected the compressive strength of the mortar mixtures as 4.2% and 21.1% improvement in the compressive strength of the cement mortar for 50% replacement compared and 100% replacement compared with the control mortar mixtures. The density of cement mortar increases with increase in copper slag. From these trial mixtures two optimized mixtures were selected and were used to cast the sandwich panels. This panels were tested for flexural behaviour and axial load compression behaviour. The behavior of sandwich panels were simulated using ANSYS and the results were compared with experimental results.   


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