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Short-term and impending precursor of sand layer stress in Wenchuan Earthquake

Wang Baoyu,Tong Xiaohui,Sun Xiaoming ,Sun Wei

Strategic Study of CAE 2009, Volume 11, Issue 6,   Pages 146-152

Abstract: text-align: justify;">An earthquake preparation physical model was established based on observation data of sandlayer stress instrument in Changping and Xiji, Beijing, earthquake precursor in the past 30 years observedby this instrument and precursor of Indonesia Earthquake (M =8.7) on December 26, 2004.The short-termand impending precursor of Wenchuan Earthquake recorded by the sand layer stress instrument was in accordance

Keywords： Wenchuan Earthquake     sand layer stress instrument     earthquake preparation physical model of sand layerstress     impending earthquake signal    

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Unified description of sand behavior

Feng ZHANG, Bin YE, Guanlin YE

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2,   Pages 121-150 doi: 10.1007/s11709-011-0104-z

Abstract: In this paper, the mechanical behavior of sand, was systematically described and modeled with a elastoplasticWithout losing the generality of the sand, a specific sand called as Toyoura sand, a typical clean sandIn the model, the results of conventional triaxial tests of the sand under different loading and drainageloading tests, then they are fixed to uniquely describe the overall mechanical behaviors of the Toyoura sand

Keywords： constitutive model     sand     stress-induced anisotropy     density     structure    

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Effects of coarse and fine aggregates on long-term mechanical properties of sea sand recycled aggregate

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 754-772 doi: 10.1007/s11709-021-0711-2

Abstract: Typical effects of coarse and fine aggregates on the long-term properties of sea sand recycled aggregateTwo different types of fine (coarse) aggregates are considered: sea sand and river sand (natural andSSRAC increase with decreasing recycled coarse aggregate replacement percentage and increasing sea sandTypical axial stress–strain curves of SSRAC vary with age.Finally, an analytical expression is suggested to construct the long-term stress–strain curve of SSRAC

Keywords： sea sand recycled aggregate concrete     recycled coarse aggregate replacement percentage     sea sand chlorideion content     long-term mechanical properties     stress–strain curve    

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Numerical simulation of compaction parameters for sand-filled embankment using large thickness sand filling

Wentao WANG, Chongzhi TU, Rong LUO

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 568-576 doi: 10.1007/s11709-017-0444-4

Abstract: The study uses the finite element method to simulate a new technique of highway sand embankment fillingin Jianghan Plain district, which can raise the thickness of sand-filled layer from 30 cm to 70 cm andcan significantly shorten the construction period based on the guarantee of sand embankment constructionThe simulation results indicate that the sand-filled layer thickness of 70 cm is suitable for the newsand filling technique, and the sand-filled embankment project with tight construction period is suggested

Keywords： sand embankment     compaction in large thickness     numerical simulation     small size vibratory roller     steady    

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Research review of the cement sand and gravel (CSG) dam

Xin CAI, Yingli WU, Xingwen GUO, Yu MING

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1,   Pages 19-24 doi: 10.1007/s11709-012-0145-y

Abstract: The cement sand and gravel (CSG) dam is a new style of dam that owes the advantages both of the concrete

Keywords： cement sand and gravel (CSG) dam     cement sand and gravel (CSG) material     research review    

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Effects of microfine aggregate in manufactured sand on bleeding and plastic shrinkage cracking of concrete

Branavan ARULMOLY; Chaminda KONTHESINGHA; Anura NANAYAKKARA

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 11,   Pages 1453-1473 doi: 10.1007/s11709-022-0877-2

Abstract: Construction industries have started to utilize manufactured sand (MS) as an effective alternative forriver sand in concrete.

Keywords： manufactured sand     fresh concrete     microfines     admixtures     shrinkage     cracking    

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Impacts of backwashing on micropollutant removal and associated microbial assembly processes in sand

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 3, doi: 10.1007/s11783-023-1634-z

Abstract:

● Backwashing in sand filters with 2-h and 4-h EBCTs was simulated

Keywords： Sand filter     Backwashing     Recovery     Micropollutants     Community composition    

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Development and Creations of Measuring Instrument Transformers and Their Testing Equipment

Zhao Xiumin,Zhao Yitao

Strategic Study of CAE 2000, Volume 2, Issue 3,   Pages 73-76

Abstract:

The development and creation of measuring instrument transformers and their testing equipment in improvingThey include the development in error compensation for instrument transformers, high accuracy instrumenttransformers with a current booster or voltage booster, current comparators and two-stage instrumentFuture work in this field, will involve the development of instrument transformers with small secondarycurrent and voltage, application of computers and microprocessors in instrument transformers and their

Keywords： instrument transformer     ratio standard     calibrator     error compensation    

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Destructive and non-destructive evaluation of concrete for optimum sand to aggregate volume ratio

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1400-1414 doi: 10.1007/s11709-021-0779-8

Abstract: As such, a detailed experimental investigation was carried out to evaluate the effect of sand-to-aggregate

Keywords： aggregates     non-destructive testing     sand-to-aggregate volume ratio (s/a)     maximum aggregate    

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Performance of fiber reinforced clayey sand composite

Amin CHEGENIZADEH, Hamid NIKRAZ

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 2,   Pages 147-152 doi: 10.1007/s11709-012-0158-6

Abstract: This study focuses on effect of fiber inclusion on the strength and other parameters of clayey sand compositeFirst part of this study is related to effective parameters on strength of the clayey sand composite

Keywords： triaxial     consolidated undrained (CU)     fiber     strength    

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The coupling of sand with ZVI/oxidants achieved proportional and highly efficient removal of arsenic

Sana Ullah, Xuejun Guo, Xiaoyan Luo, Xiangyuan Zhang, Yameng Li, Ziyu Liang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 6, doi: 10.1007/s11783-020-1273-6

Abstract: . • Sand doping facilitated proportional As trapping along the ZVI/oxidants column. • ZVI/sand/oxidantsare highly efficient for arsenic removal. • ZVI/sand/oxidants reduced significantly the Fe2+ leachingand effluent turbidity. • More than 54% of arsenic was reduced to As(III) in ZVI/sand/oxidants systemIn a packed column with a 1:20 mixture of ZVI and sand, the average As removal efficiency was 36 (1stMoreover, the leaching of Fe was significantly reduced with an increased sand ratio, resulting in clearer

Keywords： Arsenic     ZVI     Sand     Oxidants     Fixed-bed Column     Removal    

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Effect of microlimestone on properties of self-consolidating concrete with manufactured sand and mineral

Fulin Qu, Wengui Li, Xiaohui Zeng, Zhiyu Luo, Kejin Wang, Daichao Sheng

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1545-1560 doi: 10.1007/s11709-020-0678-4

Abstract: Self-consolidating concrete (SCC) with manufactured sand (MSCC) is crucial to guarantee the quality ofproperties of MSCC with different microlimestone powder (MLS) replacements of retreated manufactured sandhas the highest strength in the late age, which is even better than that of SCC made with the river sandThe obtained results can be used to promote the application of SCC made with manufactured sand and mineral

Keywords： microlimestone powder     manufactured sand     retreated manufactured sand     self-consolidating concrete     mineral    

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Instrument Industry Needs to Develop Ahead of Time

Strategic Study of CAE 2002, Volume 4, Issue 10,   Pages 94-94

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Utilization of MSWI fly ash as partial cement or sand substitute with focus on cementing efficiency and

Lei Zheng, Xingbao Gao, Wei Wang, Zifu Li, Lingling Zhang, Shikun Cheng

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 1, doi: 10.1007/s11783-019-1184-6

Abstract: Washed MSWI fly ash was used as partial cement or sand substitute.Sand replacing is beneficial for strength, while cement replacement reduces strength.with the increase in fly ash amount, whereas the strength increases when the fly ash is blended as sandhighest strength (compressive strength= 30.2 Mpa; flexural strength= 7.0 Mpa) was obtained when the sandThe macropores assigned to the gaps between particles decreased when the fly ash was used as sand replacement

Keywords： MSWI fly ash     Cementing efficiency     Health risk assessment of heavy metal     Sand replacement     Cement replacement    

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Evaluation of soil microbial toxicity of waste foundry sand for soil-related reuse

Haifeng ZHANG, Lu SU, Xiangyu LI, Jiane ZUO, Guangli LIU, Yujue WANG

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 1,   Pages 89-98 doi: 10.1007/s11783-013-0591-3

Abstract: The relationship between the chemical contaminants and soil microbial toxicity of waste foundry sand

Keywords： waste foundry sand     toxicity     bioassay     soil microbial activity     waste reuse    

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Title Author Date Type Operation

Short-term and impending precursor of sand layer stress in Wenchuan Earthquake

Wang Baoyu,Tong Xiaohui,Sun Xiaoming ,Sun Wei

Journal Article

Unified description of sand behavior

Feng ZHANG, Bin YE, Guanlin YE

Journal Article

Effects of coarse and fine aggregates on long-term mechanical properties of sea sand recycled aggregate

Journal Article

Numerical simulation of compaction parameters for sand-filled embankment using large thickness sand filling

Wentao WANG, Chongzhi TU, Rong LUO

Journal Article

Research review of the cement sand and gravel (CSG) dam

Xin CAI, Yingli WU, Xingwen GUO, Yu MING

Journal Article

Effects of microfine aggregate in manufactured sand on bleeding and plastic shrinkage cracking of concrete

Branavan ARULMOLY; Chaminda KONTHESINGHA; Anura NANAYAKKARA

Journal Article

Impacts of backwashing on micropollutant removal and associated microbial assembly processes in sand

Journal Article

Development and Creations of Measuring Instrument Transformers and Their Testing Equipment

Zhao Xiumin,Zhao Yitao

Journal Article

Destructive and non-destructive evaluation of concrete for optimum sand to aggregate volume ratio

Journal Article

Performance of fiber reinforced clayey sand composite

Amin CHEGENIZADEH, Hamid NIKRAZ

Journal Article

The coupling of sand with ZVI/oxidants achieved proportional and highly efficient removal of arsenic

Sana Ullah, Xuejun Guo, Xiaoyan Luo, Xiangyuan Zhang, Yameng Li, Ziyu Liang

Journal Article

Effect of microlimestone on properties of self-consolidating concrete with manufactured sand and mineral

Fulin Qu, Wengui Li, Xiaohui Zeng, Zhiyu Luo, Kejin Wang, Daichao Sheng

Journal Article

Instrument Industry Needs to Develop Ahead of Time

Journal Article

Utilization of MSWI fly ash as partial cement or sand substitute with focus on cementing efficiency and

Lei Zheng, Xingbao Gao, Wei Wang, Zifu Li, Lingling Zhang, Shikun Cheng

Journal Article

Evaluation of soil microbial toxicity of waste foundry sand for soil-related reuse

Haifeng ZHANG, Lu SU, Xiangyu LI, Jiane ZUO, Guangli LIU, Yujue WANG

Journal Article