简介：Cementationisproducedbymixingacertainamountofcementwiththesaturatedclay.Thepurposeofthispaperistomodelthecementationeffectonthemechanicalbehaviorofcement-treatedclay.Amicromechanicalstress-strainmodelisdevelopedconsideringexplicitlythecementationatinter-clustercontacts.Theinter-clusterbondinganddebondingduringmechanicalloadingareintroducedintwoways:anadditionalcohesionintheshearslidingandahigheryieldstressinnormalcompression.Themodelisusedtosimulateisotropiccompressionandundrainedtriaxialtestsundervariousconfiningstressesoncement-treatedSingaporeclaywithvariouscementcontents.Theapplicabilityofthepresentmodelisevaluatedthroughcomparisonsbetweennumericalandexperimentalresults.Theevolutionoflocalstressesandlocalstrainsininter-clusterplanesisdiscussedinordertoexplaintheinducedanisotropyduetodebondingatcontactlevelundertheappliedloads.

简介：在硫酸盐离子的攻击下面的水泥臼的扩大性质被试验性、理论的方法学习。首先，水泥臼与水的比率被制作到0.4，0.6，和0.8的水泥。第二，标本的扩大在硫酸盐答案埋头了在不同时间被测量。第三，在硫酸盐侵蚀下面的水泥臼的扩大的一个理论模型被优点建议代表体积元素方法。在这个模型，损坏进化由于在推迟的ettringite和水泥臼之间的相互作用被考虑。最后，数字计算被执行。数字、试验性的结果显示模型完美地描述水泥臼的扩大。

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简介：纸是调查利用建设和拆毁(C&D)的可能性的礼品的目的作为波特兰水泥的代用品浪费未加工的饭。那么被使用的C&D浪费，再循环的具体总数(RCA)和再循环的石工技术总数(RMA)在古代希腊的一地方区域从拆毁的大楼被导出，希腊。因为他们的石灰质、硅质的起源，RCA和RMA样品分别地被选择，它遵守了平常的波特兰水泥的作文未加工的饭。为那个原因，水泥的六件样品未加工的饭被准备：有平常的原料的作为一件参考书样品，并且五由在适当比例与RCA和RMA混合参考书样品。产生混合物的反应上的效果，在1350°C，1400°C和1450°C在混合物sintered根据免费石灰内容(fCaO)被评估。测试证明增加的再循环的总数改进了水泥的灼伤能力没有否定地影响水泥clinker性质的未加工的饭。而且，生产的钱ers(在1450°C的sintered)的主要部件(C3S，C2S，C3A和C4AF)的形成被X光检查衍射(XRD)支持。

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简介：在水泥臼板中的冲击波的相互作用被数字点缀关联方法和数字高速度的摄影技术学习。当盘子被同时爆炸的二根雷管破坏时，冲击波地的变化被获得。试验性的结果证明冲击波的相互作用将导致本地正常紧张的非线性的巨大的增加，导致大变丑和严肃的破坏。然而，这强烈非线性的现象的出现易感知地取决于在雷管之间的间隔，并且间隔什么时候比在哪儿的区域的直径小，将仅仅出现冲击波存在。

简介：Thispaperdescribestheresultsofaninvestigationintotheeffectofthevariationofcuringtemperaturesbetween0and60°Conthehydrationprocess,porestructurevariation,andcompressivestrengthdevelopmentofactivatedcoalgangue-cementblend(ACGC).HardenedACGCpastescuredforhydrationperiodsfrom1to360dwereexaminedusingthenon-evaporablewatermethod,thermalanalysis,mercuryintrusionporosimetry,andmechanicaltesting.Toevaluatethespecificeffectofactivatedcoalgangue(ACG)asasupplementarycementingmaterial(SCM),aflyash-cementblend(FAC)wasusedasacontrol.ResultsshowthatraisingthecuringtemperatureacceleratespozzolanicreactionsinvolvingtheSCMs,increasingthedegreeofhydrationofthecementblends,andhenceincreasingtherateofimprovementinstrength.TheeffectofcuringtemperatureonFACisgreaterthanthatonACGC.Theporestructureofthehardenedcementpasteisimprovedbyincreasingthecuringtemperatureupto40°C,butwhenthecuringtemperaturereaches60°C,thechangingnatureoftheporestructureleadstoadecreaseinstrength.Thecorrelationbetweencompressivestrengthandthedegreeofhydrationandporosityislinearinnature.

简介：AnapplicatiopnoftheopticalpyrometerisstudiedformeasuringmonochromaticemissivitiesofcementclinkerwithvariousFe2O3contnet.Theidsaofusing“brightnesstemperature”isintroducedintotheeimssivitymeasurement.Inthismethod,thereisnoneedformeasuringanactualtemperatureofsamplesurfaces,onlywithdeterminingbothbrightnesstemperaturesofasampleandablackbodycantherequiredemissivitybeevaluatedaccordingtoWien'sradiationlaw.Inpractice,thecementclinkerisregardedasagreybody,themonochromaticemissivityisapproximatelyequaltothetotalemissivity,soasingle-colouropticalpyrometerisappliedforthispurpose,Testmeasurementsarecarriedouton10kindsofcementclinkers,Experimentaldataaretreatedbytheleastsquaremethod.Asaresult,theemissivityvariationwithtemperatureatacertainFe2O3contentisquitewellrepresentedbyεn=a+bT.Furthermore,thisworkfirstreportedthattheeimissivitiesofcementclinkerchangeconsierablywithFe2O3contents.Inmultiplecementproductionthisconclusionisveryimportant.