针入度

这个结论与最新研究成果当量脆点t1.2和针入度指数PI的试验结果相一致。

But the result of tests accords with the latest which is based on breaking points t 1.2 and penetration index PI .

硅改沥青的针入度指数（PI）和当量软化点（T800）的提高，说明硅改沥青的感温性很好，高温稳定进一步加强。

The improvement of the penetration index ( PI ) and equivalent weight softening point ( T_ ( 800 )) show that diatomite-modified-asphalt is good in temperature susceptibility and being enhanced in high-temperature stability .

介绍了沥青针入度指数的由来、计算和误差，PI的分析技巧。

The stem , calculation , error and analysis of penetration index of asphalt are presented .

评价道路沥青感温性的指标包括针入度指数PI、针入度粘度指数、粘温指数等；

The indexes of temperature sensitivity are various such as PI , PVN , VTS and so on .

常规沥青的针入度等级和PG高温等级间的关系

Relationship between penetration grade and performance high temperature grade of conventional asphalt binder

针入度对室温的敏感性与PI或PVN的关系

Effect of room temperature on penetration of bitumens and PI or PVN of bitumens

随着改性剂的增加，改性沥青针入度降低，软化点升高，PI提高；

Along with the modifier increasing , the penetration degree of the modified asphalt reduces , the softening point elevates and PI index enhances ;

当SBS质量分数达到7%或以上时，则形成连续相。随着SBS质量分数的增加，改性沥青的软化点和低温延度升高，针入度和高温贮存稳定性下降。

With increasing the mass fraction of SBS in modified asphalt softening point and ductility increased , penetration and stability decreased .

研究了温度对PVC断裂伸长率、拉伸强度及加热形变量（针入度）的影响，发现与未增塑PVC相类似，增塑PVC在90℃左右出现断裂伸长率最大值；

The effects of testing temperature on the elongation ratio at break , tensile strength and compression deformation ( penetration ) were investigated in this paper .

详细研究了化学改性对SBR改性乳化沥青主要性能包括软化点、针入度和低温延度的影响规律。

It studies the orderliness of chemical modification to asphalt 's performances that include softening point , penetration and low temperature ductility .

测试了沥青胶浆以及经现场老化的常规沥青的25℃针入度及其PG高温指标。

25 ℃ penetration and PG high temperature parameter are also measured on asphalt cement and field aged conventional asphalt .

结果表明，试样的软化点随SBR质量分数的增加而升高，而针入度却随之减小；

The experimental results show that with the increase of mass fraction of SBR , the softening point increases , while needle penetration decreases .

针入度值即使是在试验误差允许的范围内产生的波动都会对PI产生较大的影响；计算PI所用的针入度-温度测试点数不同，对计算出PI间的离散性产生较大影响。

The test temperature , the bias allowed by the test precision and the number of temperature - penetration used to calculate PI can affect the value of PI severely .

此外，由于SBS的改性作用，导致沥青粘合料的脆点降低和低温（5℃）针入度的增加，SBS还可降低沥青的玻璃质过渡温度及温感性。

In addition , both Fraass breaking point and glass transition temperature are lowered and low temperature ( 5 ℃) penetration is increased because of SBS modification .

采用针入度粘度指数（PVN）法、粘温指数（VTS）法和针入度指数（PI）法分别考察了再生沥青的感温性。

In this paper the temperature susceptibility by means of penetration index PI , viscidity temperature index VTS and penetration viscidity index PVN was studied .

结果改性沥青RM老化前后针入度和软化点的变化值均小于SBS和SBR；

The testing results showed that the ratio of penetration and soften point of RM binder before and after ageing are lower than those of SBS and SBR modified binders .

以石油混合物GD为原料，通过化学改性制得GS原料，其初熔温度为95℃、针入度为18mm。

The GS material was prepared by chemical modification with petroleum mixture GD as material . Its original melting temperature was 95 ℃ and its needle penetration was 18 mm .

将苯乙烯-丁二烯-苯乙烯（SBS）聚合物改性沥青用常规试验方法（针入度、软化点、动粘度及脆点）与动态力学分析方法所得到的试验结果进行比较研究。

Thy results of conventional tests ( penetration , softening point , kinematical viscosity and Fraass breaking point ) and those of dynamic mechanical analysis ( DMA ) on Styrene Butadiene Styrene ( SBS ) polymer modified bitumen are systematically compared .

对施工所用的原材料进行了基本性能测试，在SBS改性沥青经过加热老化后，其针入度比明显大于基质沥青的针入度比值，说明SBS改性沥青的抗老化性能得到增强。

The performance tests were conduct of the raw materials used in construction , the SBS modified bitumen after heating aging , its penetration was significantly greater than the asphalt than the penetration ratio , indicating that the aging of SBS modified asphalt performance is enhanced .

首次采用GBP模型对改性石蜡的25℃针入度和100℃运动粘度进行了预测，25℃针入度预测的绝对误差（A.D.）

For the first time , 25 ℃ penetration degree and 100 ℃ kinematic viscosity of modified paraffin wax were predicted by using the generalized back propagation ( GBP ) neural network . The absolute deviation ( A.D. )

用针入度、软化点、动粘度及脆点等常规试验方法与动态力学分析方法对Styrene-Butadiene-Styrene（苯乙烯-丁二烯-苯乙烯，简称SBS）聚合物改性沥青的物理特性及流变特性进行了研究。

By way of conventional tests ( penetration , softening point , kinematic viscosity and Fraass breaking point ) and dynamic mechanical analysis ( DMA ), physical properties as well as rheological properties of styrene butadiene styrene polymer ( SBS ) modified bitumens were studied .

再生后沥青质标完全满足重交通道路石油沥青质量标准（GB50092-96）的要求，而且在老化前后延度、针入度比等关键指标优于这个标准的要求。

The property of regenerated asphalt meets the specification of heavy duty road asphalt ( GB50092-96 ) entirely and even excels to the requirement of the standard in ductility , the penetration ratio by aging .

采用沥青薄膜烘箱试验（TFOT）和紫外线老化试验，对壳牌90号重交通道路石油沥青，以及掺加添加剂后沥青的针入度、软化点、延度和粘度等指标进行了试验研究。

Employing the rolling thin film oven test and ultraviolet radiation aging test , the pene - tration index , soft point , ductility and viscosity of AH-90 asphalt and other additives modified asphalt were investigated .

道路沥青针入度比改进剂的工业应用试验

The Industry Application Using A Paving Asphalt Penetration Ratio Improver

沥青针入度测定条件对针入度指数的影响

Influence of penetration test condition of asphalt on penetration index

管道防腐层针入度试验方法（钝杆法）

Test method for penetration resistance of pipeline coatings ( blunt rod )

针入度指数作为沥青质量分级指标的利弊

Discussion on Penetration Index as Key Quality Gradation Index of Paving Asphalt

催化氧化所得沥青具有软化点高、针入度低的特点。

Bitumen obtained in this way has high softening point and low penetration .

道路沥青软化点和针入度的快速测定

Fast Determination for Softening Point and Penetration of Asphalt

介绍了一种提高道路沥青针入度比的改进剂。

A paving asphalt penetration ratio improver was introduced .