CN103592357B - Precise concrete carbonization measurement method - Google Patents
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- 239000004567 concrete Substances 0.000 title claims abstract description 53
- 238000003763 carbonization Methods 0.000 title claims description 11
- 238000000691 measurement method Methods 0.000 title abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 44
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 29
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 16
- 239000002904 solvent Substances 0.000 claims abstract description 12
- 235000010216 calcium carbonate Nutrition 0.000 claims abstract description 8
- 239000002253 acid Substances 0.000 claims abstract description 7
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 241000168254 Siro Species 0.000 claims 1
- 230000002687 intercalation Effects 0.000 claims 1
- 238000009830 intercalation Methods 0.000 claims 1
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- 238000007789 sealing Methods 0.000 abstract description 27
- 238000001514 detection method Methods 0.000 abstract description 8
- 239000000523 sample Substances 0.000 description 13
- 238000005259 measurement Methods 0.000 description 10
- 239000000843 powder Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004453 electron probe microanalysis Methods 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
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- 239000002184 metal Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
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- 238000002076 thermal analysis method Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
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- 238000007416 differential thermogravimetric analysis Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
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- 150000002500 ions Chemical class 0.000 description 1
- 238000011545 laboratory measurement Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明公开了一种精密混凝土碳化测量方法，包含以下步骤：1、针对特定设备和标准试剂对参数进行标定，对精密数显装置进行设定；2、将待测样品放入反应瓶中；3、将酸液注入溶剂腔中；4、将精密数显装置与传感器连接，随后将传感器与双连密封塞相连接，随后水平方向将试剂瓶的压力腔安装在双连密封塞上，保证溶剂腔内的酸液不要洒出，最后将反应瓶与双连密封塞相连接；5、将反应瓶竖起，使溶剂腔内的酸液流出，发生反应，产生的气体压力从双连密封塞导入传感器，由传感器将数据传送至精密数显装置，精密数显装置对传感器电信号处理后显示结果。本发明能够准确地测量出混凝土的CaCO3含量，对混凝土碳化状况准确评价，且简答易操作，检测成本低。
The invention discloses a precision concrete carbonation measurement method, comprising the following steps: 1. Calibrating parameters for specific equipment and standard reagents, and setting a precision digital display device; 2. Putting a sample to be tested into a reaction bottle; 3. Inject the acid solution into the solvent chamber; 4. Connect the precision digital display device to the sensor, then connect the sensor to the double-connected sealing plug, and then install the pressure chamber of the reagent bottle on the double-connected sealing plug in a horizontal direction to ensure Do not spill the acid solution in the solvent chamber, and finally connect the reaction bottle with the double-connected sealing plug; The plug is introduced into the sensor, and the sensor transmits the data to the precision digital display device, and the precision digital display device processes the electrical signal of the sensor and displays the result. The invention can accurately measure the CaCO3 content of the concrete, accurately evaluate the carbonation state of the concrete, and is simple and easy to operate, and has low detection cost.
Description
技术领域 technical field
本发明涉及土木工程领域混凝土结构耐久性检测的方法，具体地说，是涉及一种精密混凝土碳化测量方法。 The invention relates to a method for detecting the durability of concrete structures in the field of civil engineering, in particular to a method for measuring precision concrete carbonation.
背景技术 Background technique
混凝土碳化即中性化，是指空气中的CO2气体不断地透过混凝土中未完全充水的毛细孔，扩散到混凝土内部与其中水化产物进行中和反应，生成碳酸盐或其他物质，使混凝土孔溶液的pH值降低的过程。 Concrete carbonation is neutralization, which means that the CO2 gas in the air continuously penetrates the capillary pores in the concrete that are not completely filled with water, diffuses into the interior of the concrete and neutralizes the hydration products in it to form carbonates or other substances , the process of reducing the pH value of the concrete pore solution.
碳化降低混凝土的碱度，破坏钢筋表面的钝化膜，碳化深度达到钢筋位置，使混凝土失去对钢筋的保护作用，导致混凝土结构中钢筋锈蚀；同时，碳化还会影响混凝土收缩、强度、结构、离子迁移等诸多性质。碳化是混凝土结构在大气环境下发生耐久性破坏的首要因素，评价混凝土的碳化程度对预测一般大气环境下钢筋混凝土构筑物的耐久性有重大意义。因此，对混凝土结构中的混凝土碳化必须进行测试和判断，目前常用的混凝土碳化的判定方法有以下几种： Carbonation reduces the alkalinity of concrete, destroys the passivation film on the surface of the steel bar, and the carbonation depth reaches the position of the steel bar, causing the concrete to lose its protective effect on the steel bar, resulting in the corrosion of the steel bar in the concrete structure; at the same time, carbonation will also affect the concrete shrinkage, strength, structure, Ion migration and many other properties. Carbonation is the primary factor for the durability failure of concrete structures in atmospheric environments, and evaluating the degree of carbonation of concrete is of great significance for predicting the durability of reinforced concrete structures in general atmospheric environments. Therefore, it is necessary to test and judge the carbonation of concrete in the concrete structure. At present, the commonly used methods for judging the carbonation of concrete are as follows:
1、化学试剂法。利用不同化学试剂在不同pH值环境下的颜色变化，测出混凝土碳化深度。常用1%浓度的酚酞酒精溶液，以pH＝9为界线，已碳化区呈无色，未碳化区呈粉红色。另有一种彩虹指示剂(Rainbow indicator)，根据反应的颜色判别不同的pH值(5~13)，可测试完全碳化和部分碳化的深度。该方法间接反映混凝土的碳化程度，使用简便、成本低，但精度不高、影响因素多，且不能确定混凝土中性化原因。 1. Chemical reagent method. The carbonation depth of concrete is measured by using the color changes of different chemical reagents in different pH environments. A 1% concentration of phenolphthalein alcohol solution is commonly used, with pH = 9 as the boundary, the carbonized area is colorless, and the uncarbonized area is pink. There is also a rainbow indicator (Rainbow indicator), which can distinguish different pH values (5~13) according to the color of the reaction, and can test the depth of complete carbonization and partial carbonization. This method indirectly reflects the degree of carbonation of concrete, which is easy to use and low in cost, but the accuracy is not high, there are many influencing factors, and the cause of neutralization of concrete cannot be determined.
2、热分析方法。按一定升温速度加热混凝土时，混凝土中的水化产物在不同温度范围内发生物理化学反应，造成混凝土重量的变化，并伴随着吸热与放热现象。混凝土中的Ca( OH)2和CaCO3在一定温度下发生如下热分解反应： 2. Thermal analysis method. When the concrete is heated at a certain heating rate, the hydration products in the concrete undergo physical and chemical reactions in different temperature ranges, resulting in changes in the weight of the concrete, accompanied by endothermic and exothermic phenomena. Ca(OH) 2 and CaCO 3 in concrete undergo the following thermal decomposition reactions at a certain temperature:
Ca(OH)2 CaO +H2O Ca(OH) 2 CaO +H 2 O
CaCO3 CaO+ CO2 CaCO 3 CaO + CO 2
把差热分析和热重分析联合使用，可以获得有关碳化更完整的有用数据和资料。此方法可以直接反应水化产物的碳化程度，试验过程比较复杂。只能评价Ca( OH) 2的碳化，不能评价C-S-H的碳化，制样复杂，升温需要花费大量时间等等，不适合进行大量的试验。 By combining differential thermal analysis and thermogravimetric analysis, more complete and useful data and information on carbonization can be obtained. This method can directly reflect the carbonation degree of the hydration product, and the test process is relatively complicated. It can only evaluate the carbonization of Ca( OH) 2 , but not the carbonization of CSH. The sample preparation is complicated, and it takes a lot of time to raise the temperature. It is not suitable for a large number of tests.
3、X射线法。通过X射线衍射仪，直接测量出混凝土中不同深度处水泥石所含Ca(OH)2和CaCO3晶体的含量，判断出混凝土受碳化情况。XRD法可同时测得Ca(OH)2和CaCO3 沿深度的分布，适用于实验室精确测量。XRD法同样存在制样复杂，不便于大量试验，且定量精度差。 3. X-ray method. The content of Ca(OH) 2 and CaCO 3 crystals contained in cement stones at different depths in concrete can be directly measured by X-ray diffractometer, and the carbonation of concrete can be judged. The XRD method can simultaneously measure the distribution of Ca(OH) 2 and CaCO 3 along the depth, which is suitable for precise measurement in the laboratory. The XRD method also suffers from complex sample preparation, inconvenient mass testing, and poor quantitative accuracy.
4、电子探针显微分析法。电子探针显微分析仪( Electron Probe Micro Analyzer：EPMA) 是试样表面照射电子束时的2 次电子和反射电子来观察试样表面状态，并利用此时所产生的元素特有X 射线来获取微区表面状态、化学元素的浓度及其空间分布的一种装置，主要用于测定微区碳化状态。 4. Electron probe microanalysis. Electron Probe Micro Analyzer (Electron Probe Micro Analyzer: EPMA) is to observe the surface state of the sample by the secondary electrons and reflected electrons when the sample surface is irradiated with electron beams, and use the element-specific X-rays generated at this time to obtain A device for the surface state of the micro-area, the concentration of chemical elements and their spatial distribution, mainly used to measure the carbonization state of the micro-area.
上述四种方法中，现场检测常用化学试剂法，可测试完全碳化区的深度，虽然彩虹指示剂更加方便，但通过肉眼观察颜色比较困难，难免造成较大误差，不适合需要精确确定混凝土碳化深度的试验；对于实验室测量方法中的热分析方法、X射线法精度差、电子探针显微分析法，试验过程都过于复杂，成本高。 Among the above four methods, the chemical reagent method is commonly used for on-site detection, which can test the depth of the fully carbonized area. Although the rainbow indicator is more convenient, it is difficult to observe the color with the naked eye, which will inevitably cause large errors. It is not suitable for accurately determining the carbonation depth of concrete. For the thermal analysis method in the laboratory measurement method, the poor precision of the X-ray method, and the electron probe microanalysis method, the test process is too complicated and the cost is high.
对现有其他技术进行查询发现一些专利，举以下几个进行说明： Inquiring about other existing technologies found some patents, the following are given to illustrate:
中国专利（申请）号88220741.5实用新型专利，利用杠杆原理测量混凝土碳化深度，测量误差较大，测量的最小分度值为0.25mm，最大量程为10mm。虽然测量的最小分度值较小，但碳化比较严重即碳化超过10mm的混凝土无法进行检测。 Chinese Patent (Application) No. 88220741.5 utility model patent, using the lever principle to measure the carbonation depth of concrete, the measurement error is large, the minimum division value of the measurement is 0.25mm, and the maximum measurement range is 10mm. Although the minimum division value of the measurement is small, the concrete with serious carbonation, that is, more than 10mm carbonation, cannot be detected.
中国专利（申请）号200810039181.3发明专利，提供了一种混凝土碳化深度检测装置，可以根据情况确定检测的深度，最小检测分度值为2mm，最大检测深度没有限制。但该方法是在浇筑混凝土时，将装置固定在模板或钢筋上，只能用于新建工程的检测，而不能对已建工程的碳化进行评价；另外由于混凝土中预埋了该装置，同时对该处混凝土表面进行了处理，所以该处的碳化情况已不能真实地反映混凝土的实际碳化状况；该方法前期预埋是工作较多，测量时也需要多次测量，检测过程过于复杂。 Chinese patent (application) No. 200810039181.3 invention patent provides a concrete carbonation depth detection device, which can determine the detection depth according to the situation, the minimum detection division value is 2mm, and the maximum detection depth is not limited. However, this method is to fix the device on the formwork or steel bars when pouring concrete, which can only be used for the detection of new projects, and cannot evaluate the carbonation of existing projects; in addition, because the device is pre-embedded in the concrete, the The concrete surface at this place has been treated, so the carbonation situation at this place can no longer truly reflect the actual carbonation situation of the concrete; this method involves a lot of pre-embedded work in the early stage, and multiple measurements are required during the measurement, and the detection process is too complicated.
中国专利（申请）号00135769.7的发明专利，是一种笔式碳化深度测量器，装置结构简单，使用方便，但测量的深度不够，最深可以达到10mm，对于现有研究，深度已远达不到要求，尤其是碳化情况比较严重的构件已无法检测。 The invention patent of Chinese Patent (Application) No. 00135769.7 is a pen-type carbonization depth measuring device. The device is simple in structure and easy to use, but the depth of measurement is not enough, and the deepest can reach 10mm. For the existing research, the depth is far from reaching. Requirements, especially components with serious carbonization can no longer be detected.
以上几个比较有代表性的专利，均属于前述的化学试剂法，存在化学试剂法固有的缺陷。 The above several representative patents all belong to the aforementioned chemical reagent method, and have inherent defects in the chemical reagent method.
发明内容 Contents of the invention
本发明针对现有混凝土碳化测定方法和技术的不足，提供了精密混凝土碳化测量方法，该方法可以精确地测量出混凝土的CaCO3含量，对混凝土碳化状况准确评价，测量仪器结构简便，测量的过程比较方便，使用的试剂十分常见，试验器材成本较低，便于携带和放置，是十分具有推广价值的。 The present invention aims at the deficiencies of the existing concrete carbonation measurement methods and technologies, and provides a precise concrete carbonation measurement method, which can accurately measure the CaCO3 content of concrete, accurately evaluate the concrete carbonation status, and has a simple and convenient structure of the measuring instrument. It is more convenient, the reagents used are very common, the cost of test equipment is low, and it is easy to carry and place, which is very valuable for promotion.
本发明的技术方案是：一种精密混凝土碳化测量方法，包含以下步骤： The technical scheme of the present invention is: a kind of precision concrete carbonation measurement method, comprises the following steps:
1）参数设定：以标准碳酸钙为测试对象，以选定反应瓶为容器，根据碳酸钙与产生气体的线性关系、反应产生气体量与容器内压力的线性关系以及容器压力与传感器电信号之间的变化关系，设定精密数显装置的显示数据； 2）将待测样品放入反应瓶中； 1) Parameter setting: take the standard calcium carbonate as the test object, and use the selected reaction bottle as the container, according to the linear relationship between calcium carbonate and the gas generated, the linear relationship between the amount of gas generated by the reaction and the pressure in the container, and the container pressure and the electrical signal of the sensor Set the display data of the precision digital display device; 2) Put the sample to be tested into the reaction bottle;
3）将试剂瓶水平放置，且注液孔向上，试剂通过注液孔放入溶剂腔中； 3) Place the reagent bottle horizontally, with the liquid injection hole upward, and put the reagent into the solvent chamber through the liquid injection hole;
4）将精密数显装置与传感器的一端通过电缆相连接，随后将传感器与双连密封塞相连接，随后保持注液孔向上的水平方向将试剂瓶的压力腔套装在双连密封塞上，保证溶剂腔内的溶剂不要洒出，最后将反应瓶与双连密封塞相连接； 4) Connect the precision digital display device to one end of the sensor through a cable, then connect the sensor to the double-connected sealing plug, and then keep the liquid injection hole in an upward horizontal direction and set the pressure chamber of the reagent bottle on the double-connected sealing plug, Ensure that the solvent in the solvent chamber does not spill out, and finally connect the reaction bottle with the double-connected sealing plug;
5）将反应瓶翻转、竖起同时摇晃反应瓶体，使溶剂腔内的溶剂从注液孔流出，与反应瓶内的样品发生反应，产生的气体从传压孔进入压力腔，再流经双连密封塞的金属件进入传感器，使得传感器内的电阻发生改变，产生不同电流，根据电流数值以及预设的参数，由精密数显装置显示出测试结果。 5) Turn the reaction bottle upside down and shake the reaction bottle body at the same time, so that the solvent in the solvent chamber flows out from the liquid injection hole, reacts with the sample in the reaction bottle, and the gas generated enters the pressure chamber from the pressure transmission hole, and then flows through the The metal part of the double-connected sealing plug enters the sensor, which changes the resistance in the sensor and generates different currents. According to the current value and preset parameters, the precision digital display device displays the test results.
本发明的有益效果是：准确地测量出混凝土的CaCO3含量，对混凝土碳化状况准确评价；测量仪器结构简便，测量的过程比较方便，试验过程中所使用的试剂也十分常见，试验器材成本较低，便于携带和放置；通过试验标定和仪器设置，仪器可以直接显示CaCO3占混凝土质量分数，无须对数据再进行处理与运算；控制了反应过程，保证反应所产生气体获得真实压力值；利用双连密封塞的设置，再配合橡胶垫以及缠绕生丝，实现了大、小孔的转化问题，解决容器密封问题；试剂瓶的设置，有效地解决反应过程中气液分离的问题，保护传感器探头，提高了产品的使用寿命；另外，本产品作为一种固液相物质进行化学反应产生气体，对反应产生的气体量进行测量的方法，可用于生物、医学、化工领域，应用范围极为广泛。 The beneficial effects of the present invention are: accurately measure the CaCO3 content of concrete, and accurately evaluate the carbonation state of concrete; Low, easy to carry and place; through the test calibration and instrument settings, the instrument can directly display the CaCO 3 accounted for the concrete mass fraction, without further processing and calculation of the data; the reaction process is controlled to ensure that the gas generated by the reaction obtains a real pressure value; using The setting of double-connected sealing plugs, combined with rubber pads and winding raw silk, realizes the conversion of large and small holes and solves the problem of container sealing; the setting of reagent bottles effectively solves the problem of gas-liquid separation during the reaction process and protects the sensor probe. , which improves the service life of the product; in addition, this product, as a solid-liquid phase substance, undergoes a chemical reaction to generate gas, and the method of measuring the amount of gas generated by the reaction can be used in the fields of biology, medicine, and chemical industry, and its application range is extremely wide.
附图说明 Description of drawings
附图1为本发明具体实施例的精密混凝土碳化精密数显装置示意图； Accompanying drawing 1 is the schematic diagram of the precision concrete carbonization precision digital display device of the specific embodiment of the present invention;
附图2为本发明具体实施例的双连密封塞、试剂瓶和反应瓶的连接示意图； Accompanying drawing 2 is the connection schematic diagram of double-connected sealing plug, reagent bottle and reaction bottle of specific embodiment of the present invention;
附图3为本发明具体实施例的传感器和双连密封塞的连接侧视图； Accompanying drawing 3 is the connection side view of the sensor of the specific embodiment of the present invention and double-connected sealing plug;
附图4为本发明具体实施例的传感器和双连密封塞的连接正视图； Accompanying drawing 4 is the connection front view of the sensor of the specific embodiment of the present invention and double-connected sealing plug;
附图5为本发明具体实施例的试剂瓶外观图； Accompanying drawing 5 is the external appearance diagram of the reagent bottle of specific embodiment of the present invention;
附图6为本发明具体实施例的试剂瓶透视图； Accompanying drawing 6 is the perspective view of the reagent bottle of specific embodiment of the present invention;
附图7为本发明具体实施例的试剂瓶平面图。 Accompanying drawing 7 is the plan view of the reagent bottle of the specific embodiment of the present invention.
附图标记：1 精密数显装置；2传感器、21外螺纹、22电缆；3双连密封塞、31双连密封塞内螺纹、32金属件、33套筒、34压力孔、35 橡胶垫； 4反应瓶； 5试剂瓶、51压力腔、52 传压孔、53溶液腔、54注液孔。 Reference signs: 1 precision digital display device; 2 sensor, 21 external thread, 22 cable; 3 double-connected sealing plug, 31 double-connected sealing plug internal thread, 32 metal parts, 33 sleeve, 34 pressure hole, 35 rubber pad; 4 reaction bottles; 5 reagent bottles, 51 pressure chambers, 52 pressure transmission holes, 53 solution chambers, 54 liquid injection holes.
具体实施方式 Detailed ways
本发明的具体实施方式如下： The specific embodiment of the present invention is as follows:
采用以下方法，进行如下的测量过程： Use the following methods to carry out the following measurement process:
1)参数设定：以标准碳酸钙为测试对象，以测试过程所选用的反应瓶为容器，根据碳酸钙与产生气体的线性关系、反应产生气体量与容器内压力的线性关系以及容器压力与传感器电信号之间的变化关系，设定精密数显装置的显示数据； 1) Parameter setting: the standard calcium carbonate is used as the test object, and the reaction bottle selected in the test process is used as the container. The changing relationship between the electrical signals of the sensors is used to set the display data of the precision digital display device;
2）把混凝土试样进行分层磨粉，分层磨取的粉末盛放于密封袋中，防止与空气中的气体发生反应造成试验误差，密封袋的表面注明混凝土试样的磨取深度。 2) Grind the concrete sample layer by layer, and store the layered powder in a sealed bag to prevent test errors caused by the reaction with the gas in the air. The surface of the sealed bag indicates the grinding depth of the concrete sample .
3）将电缆22与精密数显装置1电连接，精密数显装置1连接电源，精密数显装置1带有自动归零功能，保证传感器2的电信号被正确显示。 3) Electrically connect the cable 22 to the precision digital display device 1, and the precision digital display device 1 is connected to the power supply. The precision digital display device 1 has an automatic zero return function to ensure that the electrical signal of the sensor 2 is displayed correctly.
4）将传感器2的另一端通过外螺纹21与双连密封塞3一端带有内螺纹的金属件32相连接，双连密封塞3的另一端通过双连密封塞内螺纹31与反应瓶4相连接，双连密封塞内螺纹31与反应瓶4之间设有橡胶垫35，确保橡胶垫35穿过双联密封塞3的套筒33向内延伸的一端，与双联密封塞3内侧紧密连接。 4) Connect the other end of the sensor 2 to the metal piece 32 with an internal thread at one end of the double-connected sealing plug 3 through the external thread 21, and the other end of the double-connected sealing plug 3 is connected to the reaction bottle 4 through the internal thread 31 of the double-connected sealing plug Connected with each other, a rubber pad 35 is provided between the double sealing plug internal thread 31 and the reaction bottle 4 to ensure that the rubber pad 35 passes through the inwardly extending end of the sleeve 33 of the double sealing plug 3 and connects with the inner side of the double sealing plug 3. tight connection.
5）用精密电子秤秤称取一定数量的试样粉末放置于反应瓶4中，尽量使试样粉末集中于反应瓶4的底部。 5) Use a precision electronic scale to weigh a certain amount of sample powder and place it in the reaction bottle 4, so that the sample powder is concentrated at the bottom of the reaction bottle 4 as much as possible.
6）水平方向拿试剂瓶5，注液孔54向上，使用滴管通过注液孔54向溶剂腔53中加入酸液，并将试剂瓶5上的压力腔51开口一侧套在双连密封塞3的套筒33向内延伸部分上。 6) Hold the reagent bottle 5 horizontally, with the liquid injection hole 54 upwards, use a dropper to add acid solution into the solvent chamber 53 through the liquid injection hole 54, and cover the opening side of the pressure chamber 51 on the reagent bottle 5 with a double seal The sleeve 33 of the plug 3 extends inwardly.
7）将试剂瓶5水平方向插入反应瓶4，反应瓶4与双连密封塞3通过反应瓶4与双连密封塞内螺纹31紧密连接，只旋转反应瓶4，双连密封塞3不动，试剂瓶5套在双连密封塞3的套筒33向内延伸部分上，也不会动，保证酸液不泄露。 7) Insert the reagent bottle 5 into the reaction bottle 4 in the horizontal direction, and the reaction bottle 4 and the double-connected sealing plug 3 are tightly connected through the reaction bottle 4 and the internal thread 31 of the double-connected sealing plug. Only the reaction bottle 4 is rotated, and the double-connected sealing plug 3 does not move , the reagent bottle 5 is set on the inward extension of the sleeve 33 of the double-connected sealing plug 3, and will not move to ensure that the acid does not leak.
8）将反应瓶4竖立起来，同时手持传感器2摇动反应瓶4，盐酸溶液通过溶剂腔53的注液孔54流入反应瓶，试剂瓶5中的盐酸和反应瓶4中的混凝土粉末发生化学反应，生成二氧化碳，气体的体积增大，增大的气压通过试剂瓶5上的传压孔52传至压力腔51，并经过双连密封3的压力孔34到达传感器2。试剂瓶的长度与反应瓶和双连密封塞所形成的空腔长度相当，可以避免摇动过程中试剂瓶从双连密封塞上脱落，避免了酸液进入双连密封塞的中间开口，从而有效地保护了传感器，提高了产品使用寿命。 8) Stand the reaction bottle 4 upright, and shake the reaction bottle 4 with the sensor 2 at the same time, the hydrochloric acid solution flows into the reaction bottle through the liquid injection hole 54 of the solvent chamber 53, and the hydrochloric acid in the reagent bottle 5 reacts chemically with the concrete powder in the reaction bottle 4 , carbon dioxide is generated, the volume of the gas increases, and the increased air pressure passes through the pressure transmission hole 52 on the reagent bottle 5 to the pressure chamber 51, and then reaches the sensor 2 through the pressure hole 34 of the double seal 3. The length of the reagent bottle is equivalent to the length of the cavity formed by the reaction bottle and the double-connected sealing plug, which can prevent the reagent bottle from falling off from the double-connected sealing plug during shaking, and prevent the acid liquid from entering the middle opening of the double-connected sealing plug, thus effectively The sensor is well protected and the service life of the product is improved.
9）气压大小的变化，使得传感器2内电阻发生改变，产生不同电流，不同的电流代表不同的CaCO3占混凝土粉末的质量分数，读取仪器上的数值并记录数据。 9) The change of the air pressure changes the internal resistance of the sensor 2 and generates different currents. Different currents represent different CaCO 3 mass fractions in the concrete powder. Read the value on the instrument and record the data.
10）测量结束清洗反应瓶4和试剂瓶5进行下一个测验。 10) After the measurement, clean the reaction bottle 4 and reagent bottle 5 for the next test.
11）绘制CaCO3占混凝土粉末的质量分数沿距离混凝土表面的浓度分布，对混凝土碳化进行定量的描述。 11) Draw the concentration distribution of the mass fraction of CaCO 3 in the concrete powder along the distance from the concrete surface, and quantitatively describe the carbonation of the concrete.
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| JP2007263970A (en) * | 2007-05-24 | 2007-10-11 | Mitsubishi Rayon Co Ltd | Measuring instrument of carbon dioxide gas concentration |
| CN101694449A (en) * | 2009-10-19 | 2010-04-14 | 重庆大学 | Testing device for carbonization resistance of cement based materials and testing method |
| WO2011013376A1 (en) * | 2009-07-30 | 2011-02-03 | 日本原子力発電株式会社 | Test container and test method using same |
| CN103592200A (en) * | 2012-12-12 | 2014-02-19 | 青岛理工大学 | Accurate concrete carbonization measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3939693A (en) * | 1973-04-26 | 1976-02-24 | Carrieres Et Fours A Chaux Dumont-Wautier | Process and apparatus for the qualitative and quantitative analysis of solid material |
| JP2007263970A (en) * | 2007-05-24 | 2007-10-11 | Mitsubishi Rayon Co Ltd | Measuring instrument of carbon dioxide gas concentration |
| WO2011013376A1 (en) * | 2009-07-30 | 2011-02-03 | 日本原子力発電株式会社 | Test container and test method using same |
| CN101694449A (en) * | 2009-10-19 | 2010-04-14 | 重庆大学 | Testing device for carbonization resistance of cement based materials and testing method |
| CN103592200A (en) * | 2012-12-12 | 2014-02-19 | 青岛理工大学 | Accurate concrete carbonization measuring device |
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