Study on Optimum Mixing Ratio and Properties of Lightweight Soil Using Recycled Sludge

2012 ◽  
Vol 446-449 ◽  
pp. 1366-1369
Author(s):  
Guo Cai Wang ◽  
Fei Li Jin ◽  
Ling Sha ◽  
Le Ping Huang
Keyword(s):  
Theoretical Foundation ◽  
Volume Fraction ◽  
Cement Content ◽  
Raw Material ◽  
Strength Parameters ◽  
Engineering Construction ◽  
Soil Cement ◽  
Development And Utilization ◽  
Further Development ◽  
Curing Age

In view of the large amounts of discarded sludge produced in the process of engineering construction, this paper proposes and makes use of the discarded sludge and compounds a kind of lightweight soil of adjustable intensity. In order to get the physical properties of the lightweight soil, a series of laboratory tests is made to investigate the lightweight EPS beads compounded soil using the sludge as raw material soil, cement as the solidification material, and the effect of cement content, EPS beads volume fraction and curing age, etc. on the density and strength is analyzed. The change regularity is obtained of the density and strength parameters of lightweight soil using recycled sludge with each factor. The research results can provide fundamental basis for the application and quality control of engineering waste soil, and can establish a theoretical foundation for further development and utilization.

scholarly journals Laboratory Measurement and Analysis of the Deteriorated Layer Permeability Coefficient of Soil-Cement Deteriorated in a Saline Environment

Materials ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2245 ◽  
Author(s):  
Qing Jin ◽  
Xinzhuang Cui ◽  
Junwei Su ◽  
Tu Lu ◽  
Jieru Wang ◽  
...  
Keyword(s):  
Permeability Coefficient ◽  
Cement Content ◽  
Jiaozhou Bay ◽  
Logistic Function ◽  
Test Method ◽  
Saline Environment ◽  
Soil Cement ◽  
Dredger Fill ◽  
Cement Specimen ◽  
Curing Age

The deterioration of soil-cement in a saline environment leads to a reduction in strength and an increase in permeability. Effective methods of determining the deteriorated layer permeability coefficient of soil-cement are currently lacking. A laboratory test method for measuring the permeability coefficient of the deteriorated layer was proposed using the modified permeability coefficient testing apparatus. According to the proposed method, the permeability coefficient of the deteriorated layer could be obtained after testing the permeability coefficient of the soil-cement specimen in acuring room and testing the equivalent permeability coefficient and deterioration depth of the soil-cement specimen in a deteriorated environment. Using the marine dredger fill from Jiaozhou Bay as a case study, the deteriorated layer permeability coefficients of soil-cements with different cement contents were tested. It turned out that the permeability of the deteriorated layer increases with age. At the beginning of the curing age, higher cement content led to a smaller permeability coefficient of the deteriorated layer of soil-cement. As the curing age increased, the deteriorated layer permeability coefficient of the soil-cement with higher cement content increased. The evolution of the permeability coefficient of a deteriorated layer with age can be formulated as the Logistic function. This study provides support for anti-permeability designs of soil-cement structures in saline environments.

scholarly journals Laboratory Measurement and Analysis of Deteriorated Layer Permeability Coefficient of Corroded Soil-Cement

2019 ◽  
Author(s):  
Qing Jin ◽  
Xinzhuang Cui ◽  
Junwei Su ◽  
Tu Lu ◽  
Jieru Wang ◽  
...  
Keyword(s):  
Permeability Coefficient ◽  
Cement Content ◽  
Jiaozhou Bay ◽  
Logistic Function ◽  
Test Method ◽  
Corrosive Environment ◽  
Soil Cement ◽  
Dredger Fill ◽  
Cement Specimen ◽  
Curing Age

The deterioration of soil-cement in corrosive environment leads to the reduction of strength and the increase of permeability. Effective methods of determining deteriorated layer permeability coefficient of soil-cement are currently lacking. A laboratory test method for permeability coefficient of deteriorated layer was proposed using the modified permeability coefficient testing apparatus. According to the proposed method, the permeability coefficient of deteriorated layer can be obtained after testing the permeability coefficient of the soil-cement specimen in curing room and the equivalent permeability coefficient and deterioration depth of the soil-cement specimen in corrosion environment. Taking the marine dredger fill of Jiaozhou Bay for example, the deteriorated layer permeability coefficients of soil-cements with different cement contents were tested. It turned out that the permeability of deteriorated layer increases with the increase of age. At the beginning of curing age, larger cement content leads to smaller permeability coefficient of the deteriorated layer of soil-cement. As the curing age increases, the deteriorated layer permeability coefficient of the soil-cement with larger cement content becomes larger. The evolution of the permeability coefficient of deteriorated layer with age can be formulated as the Logistic function. This study provides a support for anti-permeability designs of soil-cement structures in corrosive environment.

scholarly journals Research on Cavitation of the Rotating-Sleeve Distributing Flow System Considering Different Cam Groove Profiles

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2139
Author(s):  
Shanxiao Du ◽  
Jichao Hong ◽  
Hongxin Zhang ◽  
Qinghai Zhao ◽  
Tiezhu Zhang ◽  
...  
Keyword(s):  
Volume Fraction ◽  
Flow System ◽  
Volumetric Efficiency ◽  
Piston Pump ◽  
Operating Frequency ◽  
Cavitation Model ◽  
Pump Chamber ◽  
Orthogonal Experiments ◽  
Simulation Results ◽  
Further Development

Reciprocating piston pumps are widely used in various fields, such as automobiles, ships, aviation, and engineering machinery. Conventional reciprocating piston pump distributing flow (RPPDF) systems have the disadvantages of a loose structure and low volumetric efficiency, as well as affected positively by the operating frequency. In this paper, a novel rotating-sleeve distributing flow (RSDF) system is presented for bridging these drawbacks, as well as structurally improved to overcome the inoperable and challenging problems in oil intake and discharge found in the experiment. Moreover, the Singhal cavitation model specifically for the RSDF system and four-cam groove profiles (CGPs) is established. To find the most suitable CGP to reduce the RSDF’s cavitation, the cavitation of the RSDF system was investigated, combining with simulations by taking into account the gap among the rotating sleeve, the pump chamber, and experiments on four presented CGPs. Simulation results based on vapor volume fraction, cavitation ratio, and volumetric efficiency show that the linear profile’s cavitation is the weakest. Finally, the correctness of the simulation is verified through orthogonal experiments. This research is of great significance to the further development of the RSDF system; more important, it has great potential to promote the reform of the RPPDF method.

scholarly journals Construction sands of Podillya: patterns of distribution, resources and use

2019 ◽  
Vol 27 (3) ◽  
pp. 510-519
Author(s):  
M. Syvyj ◽  
B. Gavrychok
Keyword(s):  
Raw Materials ◽  
Raw Material ◽  
Simultaneous Increase ◽  
Clay Material ◽  
Material Base ◽  
Resource Base ◽  
Apparent Correlation ◽  
The Baltic ◽  
Further Development

This article presents the characteristics of the resource base of building sands within the three Podillya regions, the patterns of sands distribution, and proposals for increasing the extraction of raw materials . The construction sands of Podillya are confined to the Upper Cretaceous, Neogene and Anthropogenicdeposits. The decrease of the thickness of the sandy strata of the Opilsk Neogene suite in the eastern direction was observed with the simultaneous increase in the thickness of the overlapping strata of the rocks. There is no apparent correlation between the thickness of sandy interlayers and the quality of sands. The interdependence of the chemical composition of Neogene sands and the sand size module is established.The genetic predisposition for the distribution of building sands in different parts of the Podillya territory has been established. Four groups of sand deposits of different age have been identified within the Podillya regions, which contrast sharply with single deposits in the neighbouring territories.There is a very uneven distribution of explored reserves of sandy raw materials across the region and accordingly in the provision of construction sands in the different oblasts /regions of Podillya. The areas best provided with sandy raw materials are the central districts of Ternopil region and Slavutsky district of Khmelnytsky region . Sands of the Baltic stage distributed in Vinnytsia region are mostly poor in quality, clogged with clay material and require enrichment. The further development of the mineral raw material base and the prospects for increasing the production of construction sand in the Podillya regions is associated with the increase in production at the prepared deposits, the commissioning of reserve deposits, the conducting of prospecting and exploration work in the proposed potentially exploitable areas and additional exploration of individual deposits that are exploited. The research allows us to evaluate objectively the existing base of sand raw materials for various purposes in the Podillya region and to develop on this basis measures to increase it. The importance of the study is determined by the acute shortage of the raw material in most administrative districts of Khmelnytsky and Vinnytsia regions, by the growth in the volume of construction work (and accordingly the requirements for sandy raw materials) both in Podillya and in the country.

scholarly journals Functional Application for the Corn Leaf Fibre to Make Reinforced Polymer Composites Sheet

2021 ◽  
Author(s):  
Ramratan Guru ◽  
Anupam Kumar ◽  
Rohit Kumar
Keyword(s):  
Volume Fraction ◽  
Agricultural Waste ◽  
Matrix Material ◽  
Research Work ◽  
Weight Fraction ◽  
Natural Fibre ◽  
Raw Material ◽  
Corn Husk ◽  
The Matrix ◽  
Composite Product

This research work has mainly utilized agricultural waste material to make a good-quality composite sheet product of the profitable, pollution free, economical better for farmer and industries. In this study, from corn leaf fibre to reinforced epoxy composite product has been utilized with minimum 35 to maximum range 55% but according to earlier studies, pulp composite material was used in minimum 10 to maximum 27%. Natural fibre-based composites are under intensive study due to their light weight, eco-friendly nature and unique properties. Due to the continuous supply, easy of handling, safety and biodegradability, natural fibre is considered as better alternative in replacing many structural and non-structural components. Corn leaf fibre pulp can be new source of raw material to the industries and can be potential replacement for the expensive and non-renewable synthetic fibre. Corn leaf fibre as the filler material and epoxy as the matrix material were used by changing reinforcement weight fraction. Composites were prepared using hand lay-up techniques by maintaining constant fibre and matrix volume fraction. The sample of the composites thus fabricated was subjected to tensile, impact test for finding the effect of corn husk in different concentrations.

scholarly journals Research Advances of Purple Sweet Potato Anthocyanins: Extraction, Identification, Stability, Bioactivity, Application, and Biotransformation

Molecules ◽  
2019 ◽  
Vol 24 (21) ◽  
pp. 3816 ◽  
Author(s):  
Aoran Li ◽  
Ruoshi Xiao ◽  
Sijia He ◽  
Xiaoyu An ◽  
Yi He ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Structural Characterization ◽  
Functional Activity ◽  
Red Pigments ◽  
Comprehensive Review ◽  
Development And Utilization ◽  
Purple Sweet Potato ◽  
Further Development ◽  
Anti Inflammation

Purple sweet potato anthocyanins are kinds of natural anthocyanin red pigments extracted from the root or stem of purple sweet potato. They are stable and have the functions of anti-oxidation, anti-mutation, anti-tumor, liver protection, hypoglycemia, and anti-inflammation, which confer them a good application prospect. Nevertheless, there is not a comprehensive review of purple sweet potato anthocyanins so far. The extraction, structural characterization, stability, functional activity, application in the food, cosmetics, medicine, and other industries of anthocyanins from purple sweet potato, together with their biotransformation in vitro or by gut microorganism are reviewed in this paper, which provides a reference for further development and utilization of anthocyanins.

Fabrication and investigation on the properties of ilmenite (FeTiO3)-based Al composite by accumulative roll bonding

2019 ◽  
Vol 54 (10) ◽  
pp. 1259-1271 ◽  
Author(s):  
Medhat Elwan ◽  
A Fathy ◽  
A Wagih ◽  
A R S Essa ◽  
A Abu-Oqail ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Accumulative Roll Bonding ◽  
Room Temperature ◽  
Volume Fraction ◽  
Raw Material ◽  
Accumulative Roll Bonding Process ◽  
Roll Bonding ◽  
Hardness Tests ◽  
Al Composite

In the present study, the aluminum (Al) 1050–FeTiO3 composite was fabricated through accumulative roll bonding process, and the resultant mechanical properties were evaluated at different deformation cycles at ambient temperature. The effect of the addition of FeTiO3 particle on the microstructural evolution and mechanical properties of the composite during accumulative roll bonding was investigated. The Al–2, 4, and 8 vol.% FeTiO3 composites were produced by accumulative roll bonding at room temperature. The results showed improvement in the dispersions of the particles with the increase in the number of the rolling cycles. In order to study the mechanical properties, tensile and hardness tests were applied. It was observed that hardness and tensile strength improve with increasing accumulative roll bonding cycles. The microhardness and tensile strength of the final composites are significantly improved as compared to those of original raw material Al 1050 and increase with increasing volume fraction of FeTiO3, reaching a maximum of ∼75 HV and ∼169 MPa for Al–8 vol.% FeTiO3 at seventh cycle, respectively.

Progress in the Preparation of Silver Nanometer Antibacterial Material

2020 ◽  
Vol 996 ◽  
pp. 76-81
Author(s):  
Ben Jiao Li ◽  
Song Li ◽  
Bin Rong Ma ◽  
Yong Jing ◽  
Zhe Ming Zhang ◽  
...  
Keyword(s):  
Chemical Method ◽  
Antibacterial Agents ◽  
Antibacterial Properties ◽  
Physical Method ◽  
Biological Method ◽  
Preparation Methods ◽  
Antibacterial Materials ◽  
Development And Utilization ◽  
Antibacterial Material ◽  
Further Development

Silver inorganic antibacterial agents have been widely used inbiotechnology, bioengineering science, electronics, optics and water treatment because of their strong bactericidal ability, high safety and durable antibacterial properties. In this paper, the preparation methods of silver nanoparticles are reviewed, including physical method, chemical method and biological method, in order to provide a reference for the further development and utilization of silver nano-antibacterial materials.

Research on Corrosion of Reinforced Concrete Structures by Chloridion in Port Engineering Construction

2011 ◽  
Vol 90-93 ◽  
pp. 2483-2486 ◽  
Author(s):  
Yan Ying Dong ◽  
Li Shan Zhang ◽  
Ming Zhang ◽  
Tian Zhi Zhu
Keyword(s):  
Reinforced Concrete ◽  
Structural Damage ◽  
Raw Materials ◽  
Concrete Structures ◽  
Raw Material ◽  
Reinforced Concrete Structures ◽  
Engineering Construction ◽  
Rebar Corrosion ◽  
The Right ◽  
Port Engineering

In port engineering construction, the source of chloridion is concrete raw materials, admixtures and the penetration of seawater. Chloridion makes rebar corrosion, and makes the expansion and crack of reinforcement concrete, leading to concrete structural damage. By selecting the right concrete raw material, appropriate admixtures and to ensure concrete construction quality, in order to effectively avoid chloridion to the damage of reinforced concrete structures in construction.

Porous Titanium Fabricated by a Combination of Vacuum Distillation and Sintering Process

2018 ◽  
Vol 933 ◽  
pp. 78-85
Author(s):  
Xiao Tong Lu ◽  
Hong Jie Luo ◽  
Wei Yin ◽  
Lin Li Wu ◽  
Qi Le He
Keyword(s):  
Vacuum Distillation ◽  
Volume Fraction ◽  
Porous Titanium ◽  
Raw Material ◽  
Anhydrous Ethanol ◽  
Experimental Result ◽  
Sintering Process ◽  
Magnesium Powder ◽  
Opening Ratio ◽  
And Function

As a new type of material combined with special structure and function, the porous titanium was prepared through vacuum distillation and sintering process, by which the titanium powder was used as raw material, magnesium particles and its powder as space holder, anhydrous ethanol as binder. The porosity of porous titanium obtained by this method is between 35% and 75% and its opening ratio runs up to 95%. The experimental result showed that magnesium existed in the compacted precursor was evaporated rapidly in vacuum when temperature reached 750°C and removed completely within 20 minutes. The suitable sintering temperature was between 1050°C and 1250°C, but the porosity of porous titanium decreased from 76.2% to 61.3% with temperature elevated. The precursor uniformity was improved by addition of anhydrous ethanol and its formability and density was also done by addition of magnesium powder. The relative density of precursor increased from 82% to 98% with magnesium powder volume fraction varied from 30 vol.% to 80 vol.%.

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