Research on the Application of Expanded Perlite Cement Grinding Aids

2012 ◽  
Vol 217-219 ◽  
pp. 903-906
Author(s):  
Lei Xie ◽  
Bo Liu ◽  
Xin Wang ◽  
Huan Yi Liu ◽  
Wu Biao Duan
Keyword(s):  
Performance Test ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Expanded Perlite ◽  
Strength Performance ◽  
Sem Image ◽  
Mortar Strength ◽  
Grinding Aids ◽  
Cement Grinding ◽  
Testing Standards

A kind of composite grinding aids was developed of expanded perlite and grinding aids M-1,and the effect of grinding on it was analyzed by cement powder fineness, specific surface area, laser particle size analysis, SEM image and cement mortar strength performance test. The composite grinding aids have outstanding grinding effect, which shield surplus electric charge, prevent the agglutination between particles, increase the standard water consumption, and decrease the condensation time. Furthermore, the influence of cement properties were tested, and results indicate that the total testing standards meet JC/T667-2004 of grinding aids.

Study on Grinding Aids of Different Organic Group

2012 ◽  
Vol 476-478 ◽  
pp. 1702-1708
Author(s):  
Hai Yan Lin ◽  
Yong Fu Yang ◽  
Yu Jiang Wang
Keyword(s):  
Particle Size Analysis ◽  
Absorption Capacity ◽  
Repulsive Force ◽  
Hydroxyl Group ◽  
Size Analysis ◽  
Cement Pastes ◽  
Organic Group ◽  
Grinding Aids ◽  
Monohydric Alcohols ◽  
Powder Properties

Organic substances containing hydroxyl group and alcohol amine group were chosen in this paper and the effects of different organic group on powder properties and physical performance of cement pastes were studied using various methods of analysis, such as particle size analysis, fluidness analysis and XRD. The results show that monohydric alcohols have a neglectable aid-grinding effect. For Polyhydric alcohols and ethanol amine, the absorption capacity of the hydroxyl group or amido on the surface of the powder may increase in relation to the increase in groups, which can increase fineness but cannot improve the fluidity. For Diethanolamine and Triethanolamine, the absorption on the powder mainly depends on the hydroxyl group, but the amido has a strong electrostatic repulsive force, so the dispersion of the powder not only comes from high steric hindrance effect, but also the electrostatic repulsive force, which can improve the powder’s dispersity, reduce sieve residue and increase the fluidity. This research paper provides a theoretical guide for the application of grinding aids.

scholarly journals FORMULATION AND EVALUATION OF ISORHAMNETIN LOADED POLY LACTIC-CO-GLYCOLIC ACID NANOPARTICLES

2017 ◽  
Vol 10 (11) ◽  
pp. 177
Author(s):  
Kandakumar Settu ◽  
Manju Vaiyapuri
Keyword(s):  
Particle Size ◽  
Glycolic Acid ◽  
Polymeric Nanoparticles ◽  
Double Emulsion ◽  
Spherical Shape ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Characteristic Variety ◽  
Sem Image ◽  
Flexible Technology

  Objective: The aim of the present study was formulation and evaluation of isorhamnetin loaded poly lactic-co-glycolic acid (PLGA) polymeric nanoparticles (NPs).Methods: The present study was designed to incorporate the isorhamnetin in PLGA formulation by double emulsion solvent evaporation method, which offers a dynamic and flexible technology for enhancing drug solubility due to their biphasic characteristic, variety in design, composition and assembly. Synthesized isorhamnetin-PLGA NPs were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and particle size analyzer. We tested the efficacy of isorhamnetin-PLGA NPs in HepG2 cell lines.Results: From the FTIR result, we concluded that -C-N-, -C=C-, N-H, C-N, N-O, O-H, and C-H are the functional groups present in isorhamnetin-PLGA NPs, SEM image shows spherical shape of particles. The particle size analysis result shows 255-342 nm range of particles. Isorhamnetin-PLGA NPs significantly enhanced (p<0.05) the antiproliferative effect when compared to the plain drug.Conclusion: This study concluded that the newly formulated NP drug delivery systems of isorhamnetin provided an insight into the therapeutic effectiveness of the designed formulation for the treatment of chemotherapy.

scholarly journals Effect of Freeze-Thaw Cycle on Shear Strength of Lime-Solidified Dispersion Soils

2020 ◽  
Vol 6 (1) ◽  
pp. 114-129 ◽  
Author(s):  
Meng Yao ◽  
Qing Wang ◽  
Bing Ma ◽  
Yaowu Liu ◽  
Qingbo Yu ◽  
...  
Keyword(s):  
Shear Strength ◽  
Mechanical Strength ◽  
Saline Soil ◽  
Mechanical Analysis ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Freeze Thaw ◽  
Sem Image ◽  
Thaw Cycle ◽  
Freeze Thaw Cycle

The freeze-thaw cycle of saline soil in the seasonal frozen area will produce diseases such as frost heave and thaw settlement, road frost boiling, collapse and uneven settlement. In order to reduce the occurrence of these undesirable phenomena, it is often necessary to improve the saline soil in engineering. In this paper, the typical carbonate saline soil in the west of Jilin Province, China is taken as the research object. By adding different content of lime (0%, 3%, 6%, 9%, 12%, 15%), the change of mechanical strength of lime solidified saline soil under different freeze-thaw cycles (0, 1, 3, 6, 10, 30, 60 times) is studied. The mechanical analysis is carried out by combining particle size analysis test and SEM image. The test results show that although repeated freeze-thaw cycles make the soil structure loose and the mechanical strength greatly reduced, the soil particles agglomerate obviously after adding lime, its dispersion is restrained by the flocculation of clay colloid, and the shear strength of soil is improved by the increase of the cohesive force between clay particles, and the optimal lime mixing ratio of the saline soil in this area is 9%.

scholarly journals Improvement of Biocomposite Properties Based Tapioca Starch and Sugarcane Bagasse Cellulose Nanofibers

2020 ◽  
Vol 849 ◽  
pp. 96-101 ◽  
Author(s):  
Mochamad Asrofi ◽  
Sujito ◽  
Edi Syafri ◽  
S.M. Sapuan ◽  
R.A. Ilyas
Keyword(s):  
Sugarcane Bagasse ◽  
Cellulose Nanofibers ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Potential Candidate ◽  
Tapioca Starch ◽  
Sem Image ◽  
Transmission Electron ◽  
The Matrix ◽  
Image Displays

Biocomposite based tapioca starch (TS) and sugarcane bagasse cellulose nanofibers (SBCN) was made through casting method. SBCN was prepared by chemical and ultrasonication process. It was successfully displayed by transmission electron microscope (TEM) in range 20 - 45 nm. Meanwhile, particle size analysis (PSA) also supported the distribution diameter of SBCN for 59.75 ± 10.84 nm. SBCN and glycerol were used as reinforcement and plasticizer, respectively. The amount concentration of SBCN was varied from 0 to 8 wt%. Biocomposite was characterized by using scanning electron microscopy (SEM) and tensile test. SEM image displays SBCN is in good interfacial bonding with the matrix. The highest tensile strength of biocomposite was in TS/4SBCN sample for 20.84 MPa. These results showed that SBCN fiber become potential candidate as reinforcement in biocomposite application.

Acyclovir Loaded Solid Lipid Nanoparticle Based Cream: A Novel Drug Delivery System

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
EL- Assal I. A. ◽  
Retnowati .
Keyword(s):  
Drug Delivery ◽  
Drug Release ◽  
Antiviral Agent ◽  
Study Drug ◽  
Particle Size Analysis ◽  
Stability Study ◽  
Size Analysis ◽  
Solid Lipid ◽  
Dermal Delivery

Objective of the present investigation was enthused by the possibility to develop solid lipid nanoparticles (SLNs) of hydrophilic drug acyclovir. Also study vitro and vivo drug delivery. Methods: Drug loaded SLNs (ACV-SLNs) were prepared by high pressure homogenization of aqueous surfactant solutions containing the drug-loaded lipids in the melted or in the solid state with formula optimization study (Different lipid concentration, drug loaded, homogenization / stirring speed and compritol 888ATO: drug ratio). ACV - SLN incorporated in cream base. The pH was evaluated and rheological study. Drug release was evaluated and compared with simple cream- drug, ACV – SLN with compritol 888ATO and marketed cream. The potential of SLN as the carrier for dermal delivery was studied. Results: Particle size analysis of SLNs prove small, smooth, spherical shape particle ranged from 150 to 200 nm for unloaded and from 330 to 444 nm for ACV loaded particles. The EE% for optimal formula is 72% with suitable pH for skin application. Rheological behavior is shear thinning and thixotropic. Release study proved controlled drug release for SLNs especially in formula containing compritol88 ATO. Stability study emphasized an insignificant change in SLNs properties over 6 month. In-vivo study showed significantly higher accumulation of ACV in stratum corneum, dermal layer, and receptor compartment compared with blank skin. Conclusion: AVC-loaded SLNs might be beneficial in controlling drug release, stable and improving dermal delivery of antiviral agent(s).

APSAS; an Automated Particle Size Analysis System

Circular ◽  
1985 ◽  
Author(s):  
Lawrence J. Poppe ◽  
A.H. Eliason ◽  
J.J. Fredericks
Keyword(s):  
Particle Size ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Analysis System
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