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    蘇州混凝土水泥制品研究院有限公司

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    第八期

    生態型透水混凝土透水性能試驗研究
    生態型透水混凝土透水性能試驗研究
    • 徐 偉1,陸小軍2,富 瑩2
    2013年第8期
    摘要
    引用本文
    摘 要:利用自制透水系數測試裝置測試透水混凝土的透水性能,主要研究了成型工藝、設計孔隙率、石子粒徑、砂率對透水混凝土透水性能的影響。結果表明,自制透水系數測試裝置可以較準確地測試透水混凝土的透水性能,各種成型工藝下制備的透水混凝土具有不同的透水系數。砂率越大,透水系數越??;石子粒徑越大,透水系數越大;透水混凝土的孔隙率越大,透水系數越大;有效孔隙率與透水系數之間存在一定的線性關系。 Abstract: Permeability performance of the pervious concrete is tested by self-made testing device, and the effects of the molding process, design of porosity, particle size of gravel and sand ratio on the permeability performance of pervious concrete are studied. The results show that permeability performance of pervious concrete can be more accurate tested by self-made testing device, and the pervious concrete has different permeability coefficient which is prepared with different molding processes. The permeability coefficient is smaller with the greater sand ratio. The permeability coefficient is greater with the greater gravel particle size. The greater of the porosity of the pervious concrete, the greater of the permeability coefficient. And there is a linear relationship between the effective porosity ratio and permeability coefficient.
    陶瓷拋光粉和石灰石粉雙摻對混凝土性能的影響研究
    陶瓷拋光粉和石灰石粉雙摻對混凝土性能的影響研究
    • 段明磊,肖 強,程智清,楊金銓,劉 聰,王立軍
    2013年第8期
    摘要
    引用本文
    摘 要:研究了不同摻量的陶瓷拋光粉和石灰石粉對混凝土工作性、力學性能以及抗氯離子擴散和抗凍融性能的影響。結果表明,雙摻10%石灰石粉和不超過20%的陶瓷拋光粉可以提高混凝土坍落度,改善粘聚性,同時可細化混凝土孔結構并改善其界面結構,從而提高混凝土強度、抗氯離子擴散和抗凍融性能。雙摻時,陶瓷拋光粉最佳摻量為10%;繼續增加陶瓷拋光粉摻量對于改善混凝土內部結構無益,反而劣化了混凝土性能。 Abstract: Effects of different contents of ceramic polishing powder and limestone powder on the workability, mechanical properties, resistance chlorine diffusion and freezing-thawing circle of concrete are studied in this paper. The results indicate that the workability, microstructure, compressive strength, resistance chlorine diffusion and freezing-thawing circle performance of concrete mixed with 10% limestone powder and not more than 20% ceramic polishing powder are improved. The optimal replaced content of ceramic polishing powder is 10%, when mixed with limestone and ceramic polishing powder. However, the performance of concrete could not be improved when the dosage of ceramic polishing powder is more than 10%.
    含鋼渣復合摻合料對高性能混凝土抗氯離子滲透性能的影響
    含鋼渣復合摻合料對高性能混凝土抗氯離子滲透性能的影響
    • 劉 靜1,王元綱2
    2013年第8期
    摘要
    引用本文
    摘 要:應用A型復合摻合料(磨細鋼渣粉:粉煤灰:硅灰=3:5:2)、B型復合摻合料(磨細鋼渣粉:礦渣微粉:粉煤灰=1:2:1)配制復合型摻合料的高性能混凝土,通過電通量試驗分析混凝土的抗氯離子滲透性能。結果表明,隨著礦物摻合料摻量的增加,混凝土的抗氯離子滲透性能也隨之明顯提高;復摻A型摻合料混凝土的56d電通量均低于1000C,且當摻量小于30%時,其抗氯離子滲透性能顯著優于復摻B型摻合料的混凝土;當摻量大于30%時,復摻B型摻合料混凝土的電通量降低速率高于復摻A型摻合料的混凝土。 Abstract: A study on the anti-chloride ion penetration performance of high-performance concrete is made through the electric flux test, and the high-performance concrete is made with A compound admixtures (steel slag: fly ash: silica fume=3:5:2) and B compound admixtures(steel slag: ground granulated blast furnace slag: fly ash=1:2:1). The results show that the anti-chloride ion penetration performance can be obviously improved with the increase of compound admixture amount; the anti-chloride ion penetration performance of concrete with A compound admixture is significantly better than the concrete with B compound admixture when the admixture amount is less than 30%, and the electric flux of concrete with A compound admixture is below 1000C when the concrete has been cured 56 days; the electric flux decreasing speed of concrete with B compound admixture is higher than the concrete with A compound admixture when the admixture amount is more than 30%.
    土壤中產脲酶細菌的分離及其在微生物砂漿制備中的應用
    土壤中產脲酶細菌的分離及其在微生物砂漿制備中的應用
    • 李 萌1,2,程曉輝2,楊 鉆2,郭紅仙2
    2013年第8期
    摘要
    引用本文
    摘 要:從土壤中篩選培育出一株脲酶高產菌株,經16S rDNA鑒定為遲緩芽孢桿菌(Bacillus lentus)。利用該菌株制備微生物砂漿,所制備的砂漿單軸抗壓強度為2.4MPa。對所產生的物質進行X射線衍射分析,結果表明所形成的物質為方解石和球霰石,每克砂柱中碳酸鈣的含量為163.15mg/g。通過掃描電子顯微鏡觀察發現砂粒之間有球狀及六面體狀碳酸鈣結晶生成,粘結后的砂柱中仍存在大量孔隙。 Abstract: A high yield urease produced strain is isolated from soil. It is identified as Bacillus lentus by 16S rDNA sequences. Mortar is prepared using the strain, uniaxial compressive strength of it is 2.4 MPa. Analysis by XRD, the new material is calcite and vaterite. The yield of calcium carbonate in sand column is of 163.15 mg/g sand. Through SEM observation found hexahedral shaped calcium carbonate crystallization generated, and there are still a large number of pores in the sand column after bonding.
    廢舊橡膠粉改性碾壓混凝土強度試驗研究
    廢舊橡膠粉改性碾壓混凝土強度試驗研究
    • 夏孝維1,2 , 黃志軍1,2
    2013年第8期
    摘要
    引用本文
    摘 要:試驗選用40目、80目、120目三種廢舊輪胎橡膠粉按5%、10%、15%、20%以體積代砂摻入到基準碾壓混凝土中,測定了橡膠混凝土密度、含氣量、不同齡期的立方體抗壓強度和28d軸心抗壓強度。結果表明,摻入橡膠粉后,混凝土密度隨摻入量增加而減??;含氣量隨橡膠粉摻量增加而增加;基準混凝土強度會降低,且隨著橡膠粉摻入量的增加,強度降低明顯;在相同橡膠粉摻量下,80目橡膠混凝土強度最大,120目橡膠混凝土強度次之,40目橡膠混凝土強度最低。 Abstract: Three kinds of scrap tire rubber powder: 40 mesh, 80 mesh and 120 mesh are chosen with 5%, 10%, 15%, 20% (volume ratio) replaced of sand into the benchmark roller compacted rubcrete. The density, air content, different age of cube compressive strength and 28d axial compressive strength of the rubber concrete are tested. The results show that after incorporating with rubber powder, the density of concrete decreases and air content increases with the increase of rubber powder’s quantity, and the benchmark concrete strength decreases and decreases more with the more rubber powder. Under the same dosage of rubber powder, the 80 mesh rubber concrete has the largest strength, the 120 mesh rubber concrete next to it, and the 40 mesh rubber concrete has the lowest strength.
    多相復合輕骨料混凝土制備及其性能試驗研究
    多相復合輕骨料混凝土制備及其性能試驗研究
    • 麻建鎖,孫 婧,蔡煥琴,白潤山
    2013年第8期
    摘要
    引用本文
    摘 要:利用廢棄農作物玉米秸稈、橡膠顆粒、聚苯顆粒及天然浮石作為輕骨料,與水泥等原料復合制備成一種新型多相復合輕骨料混凝土。研究了四種原材料的預處理方法、多相復合輕骨料混凝土的制備工藝及配合比設計,并對混凝土的和易性、力學性能和表觀密度等性能進行了測定。結果表明,原材料經預處理后,可與水泥形成良好的界面結合,提高硬化混凝土的性能。多相復合的輕骨料混凝土可實現自然條件下的養護。配比中,當秸稈纖維與聚苯顆??倱搅俊?5%,浮石摻量≥30%時即可保證混凝土獲得良好的和易性、一定的強度和較小的表觀密度。 Abstract: A new multiphase lightweight aggregates concrete is made of cement, natural pumice, abandoned crop corn straw, rubber particles and polystyrene particles which are made from industrial wastes. The research is focused on the pretreatment method of four kinds of raw materials, the preparation process of composite lightweight concrete and concrete mix design. The performance of concrete such as the workability, mechanical properties and apparent density are tested. The results show that raw materials can form a good interface with the cement after the pretreatment, and the properties of hardened concrete will be improved. The curing of the multiphase lightweight aggregates can be realized under the natural condition. When the amount of the straw fiber and the polystyrene particles is less than 35% and the pumice is more than 30%, the fresh concrete would be had a good workability, a certain strength and smaller apparent density.
    粉煤灰對復合高性能輕骨料性能的影響
    粉煤灰對復合高性能輕骨料性能的影響
    • 元敬順,張會芳,黃洪亮,劉海華,姜珍珍
    2013年第8期
    摘要
    引用本文
    摘 要:利用粉煤灰調整原料中Al2O3含量,制備出頁巖-粉煤灰高性能輕骨料。試驗根據頁巖、粉煤灰的化學成分和利用XRD對頁巖、粉煤灰和碳化硅的礦物分析結果,設計了頁巖-粉煤灰復合原料的配比。選擇粉煤灰摻量分別為25%、30%、35%和40%,試驗焙燒溫度分別為1140℃、1150℃和1160℃。結果表明,在同一溫度下,隨著粉煤灰摻量的提高,輕骨料的顆粒強度提高,顆粒表觀密度也有所提高。當焙燒溫度為1150℃,粉煤灰摻量達40%時,輕骨料的顆粒強度達到9.5MPa,顆粒表觀密度為1060kg/m3,24h吸水率為2.5%,達到了高性能輕骨料要求。由1150℃焙燒的輕骨料照片可知,隨著粉煤灰摻量提高,孔壁厚度增加,顆粒強度提高。粉煤灰摻量為40%時,1160℃焙燒的輕骨料表面的玻璃化程度較高,24h吸水率僅2.2%。 Abstract: High performance lightweight aggregates are prepared using shale and fly ash. Test selection content of fly ash are 25%, 30%, 35% and 40% respectively, test calcination temperature are 1140 ℃, 1150℃ and 1160 ℃ respectively. With the amount of fly ash increasing, strength of lightweight aggregate particle is improved. The strength of lightweight aggregate particle with 40% fly ash and calcined at 1150℃ can achieve 9.5MPa, apparent particle density can achieve 1060kg/m3, and 24 hours water absorption rate is 2.5%, which meets the high performance lightweight aggregates demand. The surface vitrification degree of lightweight with 40% fly ash and calcined at 1160℃ is higher, 24 hours water absorption rate is only 2.2%. Research shows that adjustment of high performance lightweight aggregates could be achieved by the addition of fly ash and calcination temperature.
    后生產許可時代PCCP質量控制模式的探討
    后生產許可時代PCCP質量控制模式的探討
    • 田 華,錢 明
    2013年第8期
    摘要
    引用本文
    摘 要:介紹了預應力混凝土輸水管生產許可證制度的發展歷史及發證現狀。并以PCCP為研究對象,通過分析生產許可證制度、建設工程中產品生產監造制度對PCCP產品質量監管和質量控制所起的重要作用、各自存在的局限性以及目前PCCP生產監造暴露出的一些問題,探討了假定國務院取消工業產品生產許可證制度后,在建設工程中對PCCP全面實行生產監造制度的必要性和可行性;呼吁工程業主放寬PCCP產品監造機構資質限制條件,并提出了相關建議;此外,還建議監造機構應根據自身專業能力在市場上進行合理定位。 Abstract:The history of the product manufacturing license system of prestressed concrete aqueduct and the current situation of license issuing of enterprises are introduced. Some systems and quality control model of PCCP such as the product manufacturing license system, the role of the production supervision system on the PCCP product quality supervision and quality control in the construction project, the limitations of the two systems and some problems exposed during the process of PCCP production supervisor are analyzed. If the product manufacturing license system should be canceled by the state council, it would be very necessary and feasible to implement the production supervision system in the construction project of PCCP. Meanwhile, the project owner should relax the conditions restrictions of PCCP product supervision agency qualification, and the related suggestions are put forward. In addition, the manufacture supervision institutions should act suitable positioning in the market according to their own professional ability.
    復合配筋預應力混凝土樁樁身性能的研究
    復合配筋預應力混凝土樁樁身性能的研究
    • 王樹峰,張日紅
    2013年第8期
    摘要
    引用本文
    摘 要:分別采用GB 50010—2010《混凝土結構設計規范》附錄E和預應力混凝土管樁國標圖集10G409中的方法對復合配筋預應力混凝土樁樁身的正截面力學性能進行了設計計算,并與抗彎試驗結果進行對比分析,提出了適用于該類型樁樁身正截面承載力的計算方法。并結合預應力混凝土管樁和復合配筋樁樁基礎上節樁的水平承載力對比試驗,對復合配筋樁在地震荷載作用下的基本性能做了初步探討。 Abstract: The normal section bearing capacity of pretensioning prestressed composite reinforced concrete(PRHC) pile body are designed by the calculation method of Appendix E of GB 50010-2010 "Specification for design of concrete structures" and National Standard Design of Prestressed Concrete Piles 10G409. The two kinds of calculation values of the bearing capacity are compared with the bending test results under the same condition, and the best calculation method for normal section bearing capacity of PRHC pile body is put forward. In addition, according to the test results of horizontal bearing of pile foundation respectively using PHC piles and PRHC piles as top pieces, the basic performances of PRHC piles under the condition of earthquake load are preliminarily discussed.
    剛柔路基過渡段混凝土樁的應用技術研究
    剛柔路基過渡段混凝土樁的應用技術研究
    • 鄧劍濤
    2013年第8期
    摘要
    引用本文
    摘 要: 在軟土路基加固中,采用混凝土樁能更好地利用持力層的承載力,有效提高軟土路基的穩定性。通過調整樁長、壓樁力等措施,能夠使橋臺樁基與軟土路基之間的過渡段形成協調沉降,消除橋頭跳車現象。提出了設計時采用長而稀的布樁原則、適當的樁帽、改進施工工藝等措施,可有效減少擠土效應,保證施工質量。 Abstract: During the strengthening of the soft soil roadbed, the bearing capacity of the bearing layer can be used more sufficiently with the concrete piles and the stability of soft soil roadbed can be improved. By the methods of adjusting the length of piles, pile driving pressure and so on, the transition section between abutment pile foundation and soft soil roadbed can be coordinately settled, and the phenomenon of vehicle dumping can be eliminated. In addition, when designing, using the principles for long and thin pile distribution, appropriate pile caps, improved construction technology, etc. can effectively reduce the soil compaction effect and ensure the construction quality.
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