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    蘇州混凝土水泥制品研究院有限公司

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    發布時間:2020-01-06 00:00:00
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    第九期

    高爐渣超細粉火山灰活性評價方法研究
    高爐渣超細粉火山灰活性評價方法研究
    • 黃 陽1,黃 艷2,1,向香源1,王維清1,鄭 奎3,徐中慧1,彭 楊1
    2018年第9期
    摘要
    引用本文
    摘 要:利用Frattini試驗法、石灰吸收法、電導率法和活性指數法研究了四種不同細度高爐渣超細粉的火山灰活性。結果表明,四種方法均可反映不同細度高爐渣超細粉火山灰活性的高低。其中石灰吸收法和電導率法存在一定缺陷,僅限實驗室使用;Frattini試驗法可以定量火山灰反應中氧化鈣的消耗量;活性指數法則可直接體現水泥膠砂強度變化情況??梢?,Frattini試驗法和活性指數法可靠性較高,是評價高爐渣超細粉火山灰活性的重要手段。 Abstract: The blast furnace slag superfine powder with high pozzolanic activity is high quality cement admixture and concrete mineral additive. The pozzolanic activity of blast furnace slag superfine powder with different fineness is assessed by frattini test, lime consumption test, electrical conductivity test and strength activity index. The results show that all the four methods could characterize pozzolanic activity of blast furnace slag superfine powder. However, the lime consumption test and electrical conductivity test have the defects and are restricted in laboratory. The Frattini test could measure the amount of calcium hydroxide consumed in the pozzolanic reaction. The strength activity index method could directly reflect the change in the strength of cement mortar. Therefore, the Frattini test method and the strength activity index method have the higher reliability compared with lime consumption test and electrical conductivity test and are important for evaluating the pozzolanic activity of blast furnace slag superfine powder.
    黃陽,黃艷,向香源,等.高爐渣超細粉火山灰活性評價方法研究[J].混凝土與水泥制品,2018(9):108-112. HUANG Y,HUANG Y,XIANG X Y,et al.Study on Assessment Method of Pozzolanic Activity of Blast Furnace Slag Superfine Powders[J].China Concrete and Cement Products,2018(9):108-112.
    再生粗骨料及再生混凝土性能研究進展
    再生粗骨料及再生混凝土性能研究進展
    • 甘 福1,周脈席1,3,濮 琦2
    2018年第9期
    摘要
    引用本文
    摘 要:結合國內外再生粗骨料混凝土的研究現狀,綜述了再生粗骨料性能、再生粗骨料混凝土性能、再生混凝土改性方法及改性后的混凝土性能等方面內容,展望了再生粗骨料及再生混凝土未來研究方向。 Abstract: Combining the study of recycled coarse aggregate concrete at home and abroad, the property of recycled coarse aggregate, the performance of recycled coarse aggregate concrete, the modified method of recycled concrete and the performance of modified concrete are reviewed, and the fature research direction on recycled coarse aggregate and recycled concrete is prospected.
    甘福,周脈席,濮琦.再生粗骨料及再生混凝土性能研究進展[J].混凝土與水泥制品,2018(9):102-107. GAN F,ZHOU M X,PU Q.Research Progress of Performance of Recycled Coarse Aggregate and Recycled Concrete[J].China Concrete and Cement Products,2018(9):102-107.
    礦渣堿激發膠凝材料固化鹽漬土試驗研究
    礦渣堿激發膠凝材料固化鹽漬土試驗研究
    • 田 亮1,2,姚 曉1,董 潔2,戴 碩2,諸華軍2,楊 濤2,吳其勝2
    2018年第9期
    摘要
    引用本文
    摘 要:為解決鹽漬土路基鋪設存在的溶陷、變形等問題,采用礦渣堿激發膠凝材料固化的方法對鹽漬土的綜合性能進行優化。通過擊實試驗和無側限抗壓強度試驗研究了礦渣堿激發膠凝材料對鹽漬土抗壓強度的影響,并利用XRD和SEM分析了試樣的物相組成和微觀形貌。結果表明,礦渣堿激發膠凝材料固化鹽漬土效果顯著,摻入適量礦渣堿激發膠凝材料鹽漬土的抗壓強度和水穩定性顯著改善,反應產物中C-S-H凝膠相含量明顯增多,形成了結構穩定的膠凝-網狀混合結構。水化反應生成了新的水化產物片狀晶體和針棒狀晶體,形成了C-S-H凝膠相和鈣礬石的結構。 Abstract: To solve the problem of subsidence and deformation in the paving of saline soil roadbed, the solidification through alkali-activated slag is adopted to improve the engineering performance of the saline soil. The compaction test and unconfined compressive strength test are used to study the effects of alkali-activated slag on the compressive strength of saline soil, and the X-ray diffraction (XRD) and scanning electron microscope (SEM) are used to characterize the phase composition and microstructure of samples. The results show that the solidified roles of alkali-activated slag is remarkable. A moderate amount of alkali-activated slag can effectively improve the compressive strength and the water stability of saline soil. The morphology of the C-S-H gel phase and ettringite is assoiciated with the crystal plate and needle stick crystals, respectively.
    田亮,姚曉,董潔,等.礦渣堿激發膠凝材料固化鹽漬土試驗研究[J].混凝土與水泥制品,2018(9):98-101. TIAN L,YAO X,DONG J,et al.Experimental Study on Solidification of Saline Soil Using Alkali-activated Slag Materials[J].China Concrete and Cement Products,2018(9):98-101.
    橋墩大體積混凝土水化熱試驗研究及數值模擬
    橋墩大體積混凝土水化熱試驗研究及數值模擬
    • 劉國星,黃永輝,萬 洋
    2018年第9期
    摘要
    引用本文
    摘 要:以廣州某大橋節段模型試驗為背景,在其橋墩澆筑過程中實測了內部水化熱溫度場的變化規律,并采用Midas軟件對該橋墩混凝土澆筑過程中的水化熱溫度場進行了有限元仿真,通過仿真結果與實測結果的對比驗證了有限元模型的正確性。通過有限元模擬研究了早強混凝土和普通混凝土的水化熱溫度場差異性以及普通混凝土相比于早強混凝土到達溫度峰值時間滯后性的一般規律;并研究了設置冷管循環對大體積混凝土溫度場的影響,結果表明,在早強混凝土中設置冷管循環能有效降低大體積混凝土的水化熱溫度。 Abstract: Based on the segmental model test of a long span bridge in Guangzhou, the change law of the internal hydration heat temperature field was measured during the casting of the bridge piers, the hydration heat of the concrete construction of the pier was also simulated by using the Midas software, and the comparison between the finite element results and the measured results verified the correctness of the finite element model. Further numerical simulations were conducted to study the differences in the temperature field of hydration heat of early-strength concrete and ordinary concrete, and the general law of the time lag effect corresponding the peak temperature of the ordinary concrete and the early-strength concrete. Additionally, the effect of pipe cooling circulation system on the hydration heat temperature field of the mass concrete was also studied. The results show that setting pipe cooling circulation system in early-strength concrete can effectively reduce the hydration temperature of the mass concrete.
    劉國星,黃永輝,萬洋.橋墩大體積混凝土水化熱試驗研究及數值模擬[J].混凝土與水泥制品,2018(9):94-97. LIU G X,HUANG Y H,WAN Y.Experimental Research and Numerical Simulation on Hydration Heat of Bridge Mass Concrete[J].China Concrete and Cement Products,2018(9):94-97.
    合成纖維強力保留率與強度保留率對比分析
    合成纖維強力保留率與強度保留率對比分析
    • 王天琪1,楊鼎宜1,2,呂錦飛1,周星宇1,葛 晨1,韓 雪1
    2018年第9期
    摘要
    引用本文
    摘 要:關于合成纖維的眾多標準中,對纖維的耐堿測試結果一般以強力保留率為準,但強度保留率也是評價合成纖維的一個重要指標。為了對比分析強力保留率和強度保留率,選取了聚乙烯醇和聚丙烯兩種合成纖維進行長期高溫耐堿試驗,測試不同浸泡時間后兩種合成纖維的直徑和力學性能,分別分析纖維溶脹性、強力和強度的變化。試驗結果表明,堿溶液浸泡后合成纖維強力變化不明顯,而直徑隨時間的延長逐漸增加,溶脹性能變大,強度逐漸減小,纖維的耐堿性能下降。因此,現行標準GB/T 21120—2007《水泥混凝土和砂漿用合成纖維》中用強力保留率表征合成纖維的耐堿性能存在不合理之處,標準中并沒有考慮纖維直徑的變化,而強度保留率卻能隨直徑的變化而變化,相對而言,用強度保留率反映合成纖維的耐堿性能更加合理。 Abstract: In many standards for synthetic fibers, the alkali resistance test results for fibers are generally based on strong retention rate, but strength retention rate is also an important indicator for evaluating synthetic fibers. In order to compare the strong retention rate with the strength retention rate, the long-term high temperature and alkali resistance experiment of polyvinyl alcohol and polypropylene synthetic fibers are carried out to test the diameter and mechanical properties of the fibers after different soaking time. The results show that the strength change of the synthetic fibers after soaking in the alkaline solution was not obvious, but the diameter gradually increases with time, the swelling performance increases, and the strength and the alkali resistance of the fibers is decreased. Therefore, the current standard GB/T 21120—2007 "synthetic fibers for cement concrete and mortar" in the use of strong retention rate to characterize the alkali resistance of synthetic fibers is unreasonable, the standard does not consider the change in fiber diameter, but the strength retention rate can change with the change of diameter. Relatively speaking, it is more reasonable to reflect the alkali resistance of synthetic fiber by the strength retention rate.
    王天琪,楊鼎宜,呂錦飛,等.合成纖維強力保留率與強度保留率對比分析[J].混凝土與水泥制品,2018(9):90-93. WANG T Q,YANG D Y,LYU J F,et al.Comparison Analysis on Strong Retention Rate and Strength Retention Rate of Synthetic Fiber[J].China Concrete and Cement Products,2018(9):90-93.
    GB/T 22082—2017《預制混凝土襯砌管片》 標準解讀
    GB/T 22082—2017《預制混凝土襯砌管片》 標準解讀
    • 俞 鋒1,王春蓉1,談永泉2,黎 峰3
    2018年第9期
    摘要
    引用本文
    摘 要:隨著隧道工程建設的發展,預制混凝土襯砌管片已成為預制混凝土構件的重要產品。本文簡要介紹了即將實施的GB/T 22082—2017《預制混凝土襯砌管片》的修訂情況,并對標準條文的主要內容進行了簡要說明。 Abstract: With the development of tunnel engineering construction, precast concrete lining segment has become an important product of precast concrete components. The upcoming revision of GB/T 22082—2017 Precast Concrete Lining Segments is briefly introduced and the main contents of the standard provisions are briefly explained.
    俞鋒,王春蓉,談永泉,等.GB/T 22082—2017《預制混凝土襯砌管片》標準解讀[J].混凝土與水泥制品,2018(9):85-89. YU F,WANG C R,TAN Y Q,et al.Standard Interpretation of GB/T 22082-2017 Precast Concrete Lining Segments[J].China Concrete and Cement Products,2018(9):85-89.
    再生泡沫混凝土吸水率及干縮特性研究
    再生泡沫混凝土吸水率及干縮特性研究
    • 劉德慧
    2018年第9期
    摘要
    引用本文
    摘 要:采用廢舊混凝土經破碎、篩分而成的粒徑小于2.36 mm的再生細骨料制備泡沫混凝土,通過單因素試驗探究水灰比、減水劑摻量及聚丙烯纖維摻量對其吸水率與干縮特性的影響規律。結果表明,再生泡沫混凝土的吸水率隨水灰比的增大而增大,隨減水劑摻量的增大而顯著減小,水灰比0.76與減水劑摻量0.3%對應的吸水率最小,纖維摻量并不顯著影響吸水率特性;再生泡沫混凝土的干縮值隨減水劑摻量、纖維摻量的增大而顯著減小,減水劑摻量0.2%與纖維摻量0.2%對應的干縮值最小,水灰比并不顯著影響干縮特性。 Abstract: The recycled fine aggregate with particle size less than 2.36 mm by crushing and sieving of waste concrete was used to prepare foamed concrete, and the influence of water cement ratio, water reducer dosage and polypropylene fiber content on water absorption and drying shrinkage characteristics was studied through single factor experiment. The results show that the water absorption of recycled foamed concrete increases with the increase of water cement ratio, decreases significantly with the increase of the amount of water reducing agent, the water absorption is the smallest when water cement ratio is 0.76 and the dosage of water reducer dosage is 0.3%, the fiber content does not significantly affect the water absorption property. The dry shrinkage value of the recycled foam concrete decreases significantly with the increase of water reducer dosage and fiber content, which is the smallest when the water reducer dosage is 0.2% and fiber content is 0.2%. The water cement ratio does not significantly affect the shrinkage characteristics.
    劉德慧.再生泡沫混凝土吸水率及干縮特性研究[J].混凝土與水泥制品,2018(9):81-84. LIU D H.Study on Water Absorption and Drying Shrinkage Characteristics of Recycled Foam Concrete[J].China Concrete and Cement Products,2018(9):81-84.
    基于雙剪試驗CFRP-混凝土界面黏結性能影響因素研究
    基于雙剪試驗CFRP-混凝土界面黏結性能影響因素研究
    • 孫家國1,2,谷艷玲1,2,尹秋雨1
    2018年第9期
    摘要
    引用本文
    摘 要:通過雙面剪切試驗設計了九組試驗方案,以CFRP黏結長度、黏結寬度、黏貼層數三個因素為變量,根據CFRP應變、黏結應力的變化規律,研究了C30混凝土試件和碳纖維片材界面的黏結性能,以及在各級荷載作用下沿黏結長度的分布情況,分析了CFRP-混凝土界面的有效黏結長度。結果表明,隨著CFRP黏結厚度、長度、寬度的增大,試件的極限荷載和應變均明顯增加,但對初始剝離荷載和應變的影響不大;當繼續增加荷載時,應力傳遞區域的長度不斷加大,呈現動態變化趨勢。 Abstract: According to the changing rule of the CFRP strain and bond stress, 9 groups of schemes were designed by taking CFRP bond length, bond width and paste layer as the variables through double-sided shear test to explore bond properties of the C30 concrete specimen and carbon fiber sheet interface. Meanwhile, the effective bond length of CFRP-concrete interface was analyzed by observing the distribution of the bond length under load at all levels. The results show that the ultimate load and strain of the specimen increase obviously with the increase of the thickness, length and width of CFRP, but it has little effect on the initial peeling load and strain. As the load continues to increase, the length of the stress transfer area also increases and shows a dynamic trend.
    孫家國,谷艷玲,尹秋雨.基于雙剪試驗CFRP-混凝土界面黏結性能影響因素研究[J].混凝土與水泥制品,2018(9):77-80. SUN J G,GU Y L,YIN Q Y.Effecting Factors Research on Bond Properties of CFRP-concrete Based on Double Shear Test[J].China Concrete and Cement Products,2018(9):77-80.
    側墻結構混凝土早齡期開裂風險影響因素定量研究
    側墻結構混凝土早齡期開裂風險影響因素定量研究
    • 李 路1,李志全2,耿 敏1,姚 婷3,徐 文3
    2018年第9期
    摘要
    引用本文
    摘 要:采用基于“水化-溫度-濕度-約束”多場耦合機制的抗裂性評估理論與方法,結合城市軌道交通工程典型的主體結構形式,考慮材料、結構、施工等因素對城市軌道交通地下車站主體結構混凝土開裂風險的影響,系統研究了混凝土自身材料性能(強度等級、絕熱溫升、自生體積變形)、結構(長度、厚度)、施工工藝(澆筑季節、入模溫度、模板類型、拆模時間)等因素對開裂風險的定量影響,明晰了各參數對側墻結構混凝土開裂風險的影響規律,為抗裂性能控制指標的確定和類似工程側墻結構混凝土早期抗裂提供指導。 Abstract: Combined with the typical main structural form of urban rail transit engineering, considering the effects of materials, structure, construction on the crack resistance of urban rail transit underground station, the quantitative influence of the material properties (strength grade, adiabatic temperature rise, autogenous volume deformation), structure(length, thickness), construction process(pouring season, casting temperature, template type, demolition time) of concrete on cracking risk were studied based on “hydration-temperature-humidity-constraination” multi-field coupling theory and method of crack resistance evaluation, the influence law of various parameters on concrete cracking risk of side wall structure was clarified, which could provide guidance for the determination of crack resistance performance control index and early crack resistance of similar engineering side wall structure concrete.
    李路,李志全,耿敏,等.側墻結構混凝土早齡期開裂風險影響因素定量研究[J].混凝土與水泥制品,2018(9):70-76. LI L,LI Z Q,GENG M,et al.Quantitative Study on the Influence Factors of Cracking Risk of Side Wall Concrete at Early Age[J].China Concrete and Cement Products,2018(9):70-76.
    型鋼混凝土疊合梁恢復力模型研究
    型鋼混凝土疊合梁恢復力模型研究
    • 梁 松1,邵永健1,郭敬超1,薛禎鈺1,王國佐2
    2018年第9期
    摘要
    引用本文
    摘 要:基于型鋼混凝土疊合梁的抗震試驗研究,對混凝土強度、澆筑類型及截面類型三個試驗參數下6個試件的荷載-撓度滯回曲線展開分析。根據試驗結果,運用數據擬合方法,建立型鋼混凝土疊合梁的三折線骨架曲線模型,并給出了各段折線的方程表達式。對低周反復加載的各試件剛度退化規律進行線性回歸,得到統一的加載和卸載剛度計算表達式,建立型鋼混凝土疊合梁的恢復力模型。結果表明,通過所建議的恢復力模型計算得到的骨架曲線與試驗得到的骨架曲線吻合度較好,說明該恢復力模型具有較好的適用性。 Abstract: Based on the aseismic test of prefabricated steel reinforced concrete beam, the load-deflection hysteresis curve of six specimens under three test parameters of concrete strength, casting type and section form are analyzed. According to the experimental results, the model of three-fold line skeleton curve of prefabricated steel reinforced concrete beam is established by means of data fitting method, and the equation expressions of the fold lines are given. Linear regression is performed for the stiffness degradation rules of the specimens with low cyclic loading, and the expressions of uniform loading and unloading stiffness are obtained, then the restoring force model of the prefabricated steel reinforced concrete beam is established. The results show that the skeleton curve obtained by the proposed recovery model is close to the test results, which indicates that the restoring force model is applicable.
    梁松,邵永健,郭敬超,等.型鋼混凝土疊合梁恢復力模型研究[J].混凝土與水泥制品,2018(9):65-69. LIANG S,SHAO Y J,GUO J C,et al.Model Research on Restoring Force of Prefabricated Steel Reinforced Concrete Beams[J].China Concrete and Cement Products,2018(9):65-69.
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