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放热峰
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  exothermic peak
    When oxygen concentration is more than 6.32%, DTA thermographs of all sample exist two exothermic peak, the amounts of combustion volatiles and char residues increase with oxygen concentration.
    当氧气浓度大于6.32%时,各样品DTA曲线上均有两个明显放热峰,并且随着氧气浓度的增加,DTA曲线放热峰越尖锐,放热峰面积越大,说明氧气浓度越大,在两阶段失重过程中更多的挥发分物质和固体炭化物参与燃烧。
短句来源
  exothermal peak
    g. the gel times of DMT system(B) was 2/3 times lower than that of DMA system(A),the curing time was 1/3 times and the exothermal peak temperature of B was higher than that of A.
    室温下用过氧化苯甲酰作引发剂时,发现DMT反应效率是DMA的1 5~3 5倍,与实验结果一致,即DMT的凝胶时间和固化时间比DMA分别缩短2/3和62%以上,放热峰温度也比DMA的高;
短句来源
  “放热峰”译为未确定词的双语例句
    The setting time of cement paste adding ASM was 100min~150min less than that of ASP,with retarded hydration of cement.
    掺0.5%ASM的水泥净浆凝结时间比同掺量ASP分别缩短100min~150min,可延缓水泥的初期水化,推迟水泥水化放热峰的出现约16h。
短句来源
    The initial and final setting time of cement paste treated with ASP prolong 115 min and 6.5 h respectively than that of untreated, while the exothermin peak of hydration of cement appears 7 h later than that of untreated, though the peak cannot be reduced significantly.
    掺加0.5%ASP的水泥净浆初凝和终凝时间较空白分别延长1h55min和6h30min,水泥水化放热峰较空白推迟约7h,但不能明显降低水化放热峰值;
短句来源
    Moreover, there is an interactive effect between the initial cracking time and resistivity inflexion, as well as maximum heat peak. A ratio of resistivity step/heat step (as K value) indicates a relation between early-age deformation and alkali content of cement-based materials.
    水泥基材料的初始开裂时间与电阻率曲线上的特征点以及最大放热峰之间存在一定的联系,所提出的阻率步长与热率步长之比值K与水泥基材料的开裂敏感性及碱含量密切相关。
短句来源
    Test results indicate that compared with the hydration heat evolution process of pure cement,the cement-silica fume binary system can elongate the dormant period,increase the exothermic rate of the second hydration heat evolution peak and reduce the accumulative heat during the deceleration period;
    试验结果表明:相对于纯水泥,水泥-硅灰二元体系的水化诱导期延长,第二水化放热峰放热速率增加,水化减速期的总放热量减小;
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  exothermic peak
At absorpbed dose of 5 MGy the first exothermic peak is shifted by 15-20°C; in this case, both exothermic peaks coalesce and the oxidation can be considered as single-stage process starting at 110°C.
      
DSC thermograms for the curing of C1P and C2P with benzoyl peroxide (BPO) and NMA/MTHPA showed two distinct exothermic peak positions, Tp and T1p, due to the curing of esterified fraction and epoxy groups, respectively.
      
The results show that the supported Pd catalysts have two exothermic peaks at around 312 °C and 435 °C in the DSC thermograms, respectively, while the supported Pt catalysts have one exothermic peak at approximately 345 °C.
      
Using DSC, the exothermic peak due to precipitation from the supersaturated α-Al matrix was observed in the range of 200-250°C during continuous heating of atomized powder, and the size of the peaks increased with decreasing powder size.
      
Metastable phase with structure type of sigma phase (e.g., in Fe-Cr alloys) was observed in melt spun ribbons by rapid heating or annealing at temperatures below the first exothermic peak of DTA curve.
      
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  exothermic peaks
In the derivatograms of the anion exchanger in the nitrate form there are one endothermic and two exothermic peaks (~100, 160-180, and 200-220°C).
      
At absorpbed dose of 5 MGy the first exothermic peak is shifted by 15-20°C; in this case, both exothermic peaks coalesce and the oxidation can be considered as single-stage process starting at 110°C.
      
The homogeneity of the product is correlated with the temperature of exothermic peaks above 1100 K due to the crystallization of MgTiO3, but not with the endothermic peaks around 650 K.
      
During the thermal analysis, the cross-linked co-polymers exhibited two exothermic peaks and one endothermic peak, indicating the presence of HTPB and GAP polymeric chain segments in the co-polymers.
      
During the baking of the dry-gel powder, two exothermic peaks occur, followed by the formation of Li2O and Co3O4 and then the combination of LiCoO2, which is testified by DTA and XRD.
      
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  exothermal peak
The Raman spectra of Li2O · 7GeO2 glasses, which are heat treated under different conditions at temperatures near the temperature corresponding to the first exothermal peak in the DTA curve, are measured in the frequency range 20-1100 cm-1.
      
We have found that there is an exothermal peak on the DTA curve of nanostructured γ-Fe2O3 sample and that this peak is not repeatable.
      
The XRD microstructure analysis confirms for the first time that this exothermal peak corresponds to the structural phase transition from γ-Fe2O3 to α-Fe2O3.
      
The DTA curve showed that boric acid treated basswood has an exothermal peak at 420°C, indicating the exothermal polymerization reaction of charring.
      
DSC data show that prolonged exposure to UV light and post-thermal treatment can decrease the Tonset and Tpeak of the exothermal peak and the condensation temperature between TiOH, and increase ΔH of the exothermal peak.
      
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Aminosulfonic acid-based superplasticizer is a type of new superplasticizer with retarding performances, and its retarding performances are studied in this paper. The results indicate that it has high dispersing capability and low fluidity loss, and the relative fluidity loss rate is 7.7% within 120 min that is more less than FDN. The initial and final setting time of cement paste treated with ASP prolong 115 min and 6.5 h respectively than that of untreated, while the exothermin peak of hydration of cement...

Aminosulfonic acid-based superplasticizer is a type of new superplasticizer with retarding performances, and its retarding performances are studied in this paper. The results indicate that it has high dispersing capability and low fluidity loss, and the relative fluidity loss rate is 7.7% within 120 min that is more less than FDN. The initial and final setting time of cement paste treated with ASP prolong 115 min and 6.5 h respectively than that of untreated, while the exothermin peak of hydration of cement appears 7 h later than that of untreated, though the peak cannot be reduced significantly. The 28 d compressive strength ratio of concrete treated with ASP is 138% of that of untreated, the microstructure of cement paste specimens is more uniform and compact than that of concrete treated with FDN, and the reticular structure of specimens can hardly be observed. So that the aminosulfonic acid-based superplasticizer is suitable for preparing pumping high strength and high performance concrete.

氨基磺酸系高效减水剂是一种具有缓凝性能的新型高效减水剂,研究的结果表明:氨基磺酸系高效减水剂ASP分散能力强,流动度损失小,120min内相对流动度损失率仅为7.7%,远小于萘系减水剂FDN;掺加0.5%ASP的水泥净浆初凝和终凝时间较空白分别延长1h55min和6h30min,水泥水化放热峰较空白推迟约7h,但不能明显降低水化放热峰值;混凝土28d抗压强度为空白的138%,其混凝土试块微结构比掺FDN的试块更为均匀、细密,基本上已看不出网状结构。氨基磺酸系高效减水剂适合配制用于泵送的高强高性能混凝土。

N,N-dimethyl-P-toluidine (DMT) was compared to N,N-dimethyl aniline (DMA) as cure reaction promoters for an unsaturated polyester resin anchor agent.It was found that for benzoyl peroxide(BPO) initiation at room temperature,DMT was 1.5~3.5 times efficient(by weight) than the more common DMA,as indicated by decreased gel and cure times,e.g. the gel times of DMT system(B) was 2/3 times lower than that of DMA system(A),the curing time was 1/3 times and the exothermal peak temperature of B was higher than that of...

N,N-dimethyl-P-toluidine (DMT) was compared to N,N-dimethyl aniline (DMA) as cure reaction promoters for an unsaturated polyester resin anchor agent.It was found that for benzoyl peroxide(BPO) initiation at room temperature,DMT was 1.5~3.5 times efficient(by weight) than the more common DMA,as indicated by decreased gel and cure times,e.g. the gel times of DMT system(B) was 2/3 times lower than that of DMA system(A),the curing time was 1/3 times and the exothermal peak temperature of B was higher than that of A.The greater reactivity of DMT over DMA at low temperature could be best appreciated from a plot of gel time vs.cure temperature.BPO/DMT systems displayed reactivity essentially equal to double initiators(BPO and 2,4-dichlorobenzoylperoxide)/DMA systems for fast curing resin anchor agent.

研究了过氧化物与芳叔胺N,N-二甲基苯胺(DMA)和N,N-二甲基对甲苯胺(DMT)组成的体系引发不饱和聚酯锚固剂的固化,两种促进剂的锚固力和压缩强度相当;室温下用过氧化苯甲酰作引发剂时,发现DMT反应效率是DMA的1 5~3 5倍,与实验结果一致,即DMT的凝胶时间和固化时间比DMA分别缩短2/3和62%以上,放热峰温度也比DMA的高;由此说明,DMT比DMA具有更大的低温反应活性。在不用2,4-二氯代过氧化苯甲酰条件下,过氧化苯甲酰和DMT组成的体系也能使锚固剂达到超快速固化;说明DMT适合作锚固剂的促进剂。

Initial cracking time, electrical resistivity and rate of heat evolution of cement-based materials with different alkalinities were measured by an ellipsis-ring cracking apparatus with an automatic monitoring system, non-contact resistivity instrument and JAF calorimeter, respectively. Results show that the alkali accelerates the hydration process of portland cement but shortens greatly the initial cracking time of mortar, especially at a lower watercement ratio. Moreover, there is an interactive effect between...

Initial cracking time, electrical resistivity and rate of heat evolution of cement-based materials with different alkalinities were measured by an ellipsis-ring cracking apparatus with an automatic monitoring system, non-contact resistivity instrument and JAF calorimeter, respectively. Results show that the alkali accelerates the hydration process of portland cement but shortens greatly the initial cracking time of mortar, especially at a lower watercement ratio. Moreover, there is an interactive effect between the initial cracking time and resistivity inflexion, as well as maximum heat peak. A ratio of resistivity step/heat step (as K value) indicates a relation between early-age deformation and alkali content of cement-based materials.

用椭圆型开裂环自动测试装置和非接触式电阻率测定仪以及JAF量热计,分别测试不同水灰比、不同碱度水泥砂浆的初始开裂时间以及水泥浆体早期水化的电阻率与水化放热速率。结果表明:碱度增加虽然加速水泥的水化,但削弱了水泥基材料抵抗收缩变形的能力,在低水灰比下表现更为明显。水泥基材料的初始开裂时间与电阻率曲线上的特征点以及最大放热峰之间存在一定的联系,所提出的阻率步长与热率步长之比值K与水泥基材料的开裂敏感性及碱含量密切相关。

 
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