JP3458136B2 - Measuring device and measuring method for measuring water absorption of aggregate - Google Patents
Measuring device and measuring method for measuring water absorption of aggregateInfo
- Publication number
- JP3458136B2 JP3458136B2 JP2000013204A JP2000013204A JP3458136B2 JP 3458136 B2 JP3458136 B2 JP 3458136B2 JP 2000013204 A JP2000013204 A JP 2000013204A JP 2000013204 A JP2000013204 A JP 2000013204A JP 3458136 B2 JP3458136 B2 JP 3458136B2
- Authority
- JP
- Japan
- Prior art keywords
- aggregate
- measuring
- water absorption
- water
- mass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 100
- 238000010521 absorption reaction Methods 0.000 title claims description 65
- 238000000034 method Methods 0.000 title claims description 19
- 238000001035 drying Methods 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 description 5
- 238000003908 quality control method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 101100000858 Caenorhabditis elegans act-3 gene Proteins 0.000 description 1
- HEFNNWSXXWATRW-UHFFFAOYSA-N Ibuprofen Chemical compound CC(C)CC1=CC=C(C(C)C(O)=O)C=C1 HEFNNWSXXWATRW-UHFFFAOYSA-N 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【発明の属する技術分野】本発明は、骨材の吸水率の測
定に関するものである。TECHNICAL FIELD The present invention relates to measurement of water absorption of aggregate.
【０００２】[0002]
【従来の技術】従来、コンクリートの吸水率の測定は、
ＪＩＳ−Ａ−１１１０試験方法があり、これは、骨材を
飽水状態にさせるため、２０℃の室温で約２４時間水に
浸し、吸水させる。次に、骨材表面の水膜をぬぐい取
り、この時点の質量（ａｇ）を測定する。次に、この骨
材を１００℃の乾燥炉内で定質量となるまで乾燥し、室
温まで冷却し、その質量（ｂｇ）を測る。2. Description of the Related Art Conventionally, the water absorption of concrete is measured by
There is a JIS-A-1110 test method, in which the aggregate is soaked in water at room temperature of 20 ° C. for about 24 hours so as to be saturated with water so as to absorb water. Next, the water film on the surface of the aggregate is wiped off, and the mass (ag) at this point is measured. Next, this aggregate is dried in a drying oven at 100 ° C. to a constant weight, cooled to room temperature, and the weight (bg) is measured.
【０００３】吸水率（Ｑ）は、上記で測定した吸水状態
の質量（ａｇ）と乾燥状態の質量（ｂｇ）を用いて、式
Ｑ＝（ａ−ｂ）／ｂ×１００（％）から求める。The water absorption rate (Q) is obtained from the equation Q = (ab) / b × 100 (%) using the water absorption state mass (ag) and the dry state mass (bg) measured above. .
【０００４】しかし、近年重要視されている、再生骨
材、低品質天然骨材は、一般に吸水率が通常の骨材と比
較して大きい。このような骨材を、自然吸水による従来
の試験方法に基づいて吸水させた場合、骨材の吸水曲線
は、図３のようになった。即ち、２４時間程度（ＪＩＳ
試験法で得られた吸水率）では吸水が完了せず、ほぼ完
全に吸水を完了するには、約１週間（１６８時間）以上
を要した。更に、骨材を定質量になるまで乾燥させるに
は、約２日程度は最低必要となる。このような多孔質骨
材を、ＪＩＳの方法に準じて試験した場合、約１０日程
度を要することになる。However, recycled aggregates and low-quality natural aggregates, which have been regarded as important in recent years, generally have a higher water absorption rate than ordinary aggregates. When such an aggregate was made to absorb water based on the conventional test method by natural absorption, the water absorption curve of the aggregate was as shown in FIG. That is, about 24 hours (JIS
Water absorption was not completed by the water absorption obtained by the test method), and it took about 1 week (168 hours) or more to complete the water absorption almost completely. Furthermore, about 2 days is the minimum required to dry the aggregate to a constant weight. When such a porous aggregate is tested according to the JIS method, it takes about 10 days.
【０００５】一方、再生骨材などは、解体ガラなどより
製造されるため、一般に一ロッドから製造される量が、
天然骨材と比較して極端に少なく、しかも、吸水率など
特性がロッド毎に雑多になっている。そのため、吸水率
の測定回数を多くする必要があり、しかも、測定時間を
短時間に行う必要がある。もし、従来の自然吸水によっ
て再生骨材の品質管理を実施すると、結果が出る頃に
は、既に再生コンクリートとして施工に供されてしまう
危険が生じる。On the other hand, since recycled aggregate is manufactured from demolition debris, etc., the amount manufactured from one rod is generally
Compared to natural aggregate, it is extremely small, and the characteristics such as water absorption are mixed for each rod. Therefore, it is necessary to increase the number of times of measuring the water absorption rate, and further, it is necessary to perform the measurement time in a short time. If the quality control of the recycled aggregate is performed by conventional natural water absorption, there is a risk that it will be already used as recycled concrete for construction by the time the result comes out.
【０００６】なお、再生骨材の利用については、本出願
人が特願平１０−３３９４７２号、特願平１１−１１５
４５５号として出願している。Regarding the use of recycled aggregate, the present applicant has filed Japanese Patent Application Nos. 10-339472 and 11-115.
I am applying for No. 455.
【０００７】[0007]
【発明が解決しようとする課題】＜イ＞本発明は、骨材
の吸水率を迅速に測定することにある。
＜ロ＞また、本発明は、多孔質の骨材の吸水率を迅速に
測定することにある。<A> The present invention is to quickly measure the water absorption of an aggregate. <B> Further, the present invention is to rapidly measure the water absorption rate of the porous aggregate.
【０００８】[0008]
【課題を解決するための手段】（１）本願の第１の発明
は、骨材の乾燥状態の質量と吸水状態の質量から骨材の
吸水率を測定する測定装置において、骨材の質量を測定
する質量測定装置と、骨材を乾燥する乾燥装置と、水中
に骨材を配置し加圧する加圧吸水装置とを備えているこ
とを特徴とする、骨材の吸水率を測定する測定装置であ
る。
（２）本願の第２の発明は、第１の発明の骨材の吸水率
を測定する測定装置において、乾燥装置は、高周波加熱
装置であることを特徴とする、骨材の吸水率を測定する
測定装置である。
（３）本願の第３の発明は、骨材の乾燥状態の質量と吸
水状態の質量から骨材の吸水率を測定する測定方法にお
いて、水中に骨材を配置し加圧し、吸水状態の骨材の質
量を測定し、骨材を乾燥し、乾燥状態の骨材の質量を測
定する、又は、骨材を乾燥し、乾燥状態の骨材の質量を
測定し、水中に骨材を配置し加圧し、吸水状態の骨材の
質量を測定することを特徴とする、骨材の吸水率を測定
する測定方法である。
（４）本願の第４の発明は、第３の発明の骨材の吸水率
を測定する測定方法において、骨材の乾燥は、高周波加
熱で乾燥することを特徴とする、骨材の吸水率を測定す
る測定方法である。
（５）本願の第５の発明は、第３の発明の骨材の吸水率
を測定する測定方法において、骨材を水中に配置する
際、蓄熱した状態の骨材を使用することを特徴とする、
骨材の吸水率を測定する測定方法。、骨材の吸水率を測
定する測定方法である。(1) A first invention of the present application is to provide a measuring device for measuring a water absorption rate of an aggregate based on a mass of the aggregate in a dry state and a mass of the aggregate in a water absorbing state. A measuring device for measuring a water absorption rate of an aggregate, comprising a mass measuring device for measuring, a drying device for drying the aggregate, and a pressurized water absorbing device for arranging and pressurizing the aggregate in water. Is. (2) A second invention of the present application is, in the measuring apparatus for measuring the water absorption rate of the aggregate of the first invention, the drying apparatus is a high-frequency heating apparatus, and measures the water absorption rate of the aggregate. It is a measuring device. (3) A third invention of the present application is a measuring method for measuring the water absorption rate of an aggregate from the mass of the aggregate in a dry state and the mass of a water absorbing state, wherein the aggregate is placed in water and pressurized to absorb the bone The mass of the aggregate is measured, the aggregate is dried, and the mass of the aggregate in the dry state is measured, or the aggregate is dried, the mass of the aggregate in the dry state is measured, and the aggregate is placed in water. A measuring method for measuring a water absorption rate of an aggregate, which comprises pressurizing and measuring a mass of the aggregate in a water absorbing state. (4) A fourth invention of the present application is the method for measuring the water absorption rate of an aggregate according to the third invention, wherein the drying of the aggregate is performed by high-frequency heating. Is a measuring method for measuring. (5) A fifth invention of the present application is characterized in that, in the measuring method for measuring the water absorption rate of the aggregate of the third invention, when the aggregate is placed in water, the aggregate in a heat-stored state is used. To do
A measuring method for measuring the water absorption rate of an aggregate. A measurement method for measuring the water absorption rate of the aggregate.
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施の形態を説明
する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.
【００１０】＜イ＞骨材の吸水率を測定する測定装置
骨材の吸水率を測定する測定装置は、図１に示されてい
るように、骨材を十分に乾燥する乾燥装置、骨材と水を
容器に入れて骨材に十分水を吸収させる加圧吸水装置、
及び、乾燥状態の質量と吸水状態の骨材の質量を測定す
る質量測定装置を備えている。必要に応じて、測定した
乾燥状態の質量と吸水状態の骨材の質量を基にして骨材
の吸水率を算出する計算装置を配置する。<A> Measuring Device for Measuring Water Absorption of Aggregate As shown in FIG. 1, a measuring device for measuring water absorption of an aggregate is a drying device for sufficiently drying the aggregate, an aggregate. And a pressurized water absorption device that puts water in a container and absorbs water sufficiently into the aggregate,
Further, it is provided with a mass measuring device for measuring the mass of the dry state and the mass of the aggregate in the water absorbing state. If necessary, a calculation device for arranging the water absorption rate of the aggregate based on the measured mass of the dry state and the measured mass of the aggregate in the water absorbing state is arranged.
【００１１】乾燥装置は、骨材全体に対して速く十分に
乾燥処理をできるものがよく、例えば、加熱装置や高周
波加熱装置が使用できる。また、加圧吸水装置は、水と
骨材を一緒に配置し、水に圧力を付与し、骨材全体に対
して速く十分に吸水させるもので、例えば、アムスラー
を使用し、密閉加圧する。It is preferable that the drying device be capable of drying the entire aggregate quickly and sufficiently. For example, a heating device or a high frequency heating device can be used. Further, the pressurized water absorbing device is a device in which water and aggregate are arranged together, pressure is applied to the water, and water is quickly and sufficiently absorbed in the entire aggregate, and, for example, Amsler is used to perform hermetic pressure.
【００１２】これら装置を使用することにより、骨材の
中でも、特に再生骨材をはじめとする多孔質骨材に対し
ても、乾燥処理や吸水処理の処理時間を短縮することが
できる。By using these devices, it is possible to shorten the treatment time of the drying treatment or the water absorption treatment even for the aggregate, particularly for the porous aggregate including the recycled aggregate.
【００１３】＜ロ＞吸水率の算出
骨材の吸水率の算出における処理方法の一実施例を図１
に示す。その際の骨材の吸水率の変化を図２に示す。先
ず、吸水率試験に供する試料は、絶乾状態の２３８９．
８ｇの再生骨材を使用する。この骨材を１０日間吸水
し、吸水率は２．４％程度であった。この骨材を使用し
て試験を開始する。<B> Calculation of Water Absorption Rate One embodiment of the processing method in the calculation of the water absorption rate of the aggregate is shown in FIG.
Shown in. The change in water absorption of the aggregate at that time is shown in FIG. First, the sample used for the water absorption test was 2389.
Use 8 g of recycled aggregate. Water was absorbed from this aggregate for 10 days, and the water absorption rate was about 2.4%. The test is started using this aggregate.
【００１４】先ず、水分を除去するために、骨材を乾燥
装置１で加熱乾燥する。吸水率をほぼ０％にするには、
乾燥装置１として乾燥炉を使用すると１日程度かかり、
電子レンジなどの高周波加熱装置では、６０分程度かか
った。乾燥後、質量測定装置２で質量（Ｂｇ）を測定す
る。First, in order to remove water, the aggregate is heated and dried by the dryer 1. To make the water absorption rate almost 0%,
If you use a drying oven as the drying device 1, it will take about 1 day,
It took about 60 minutes with a high-frequency heating device such as a microwave oven. After drying, the mass measuring device 2 measures the mass (Bg).
【００１５】次に、加圧可能な容器５に水を張り、乾燥
した骨材を投入する。骨材は蓄熱しているので、水中に
投入して冷却することにより熱間吸水する。これによ
り、骨材は、急激に水を吸収し、吸水率が１．５％程度
になった。Next, water is poured into the pressurizable container 5 and the dried aggregate is put therein. Since the aggregate stores heat, it absorbs hot water by being put into water and cooled. As a result, the aggregate rapidly absorbed water and the water absorption rate became about 1.5%.
【００１６】しかし、完全に吸水するには、更に加圧し
て、骨材内部への水の圧入を行う。圧入によって６０分
程度で十分に吸水し、吸水率が２．４％程度になった。
加圧する圧力は、吸水率が向上する圧力なら良く、例え
ば３ＭＰａ〜５ＭＰａが好ましかった。However, in order to completely absorb the water, the pressure is further applied to press the water into the aggregate. Water was sufficiently absorbed in about 60 minutes by press fitting, and the water absorption rate became about 2.4%.
The pressure to be applied may be any pressure that improves the water absorption rate, and for example, 3 MPa to 5 MPa is preferable.
【００１７】十分に吸水後、骨材を容器５より取り出
し、骨材表面の水膜を拭い、質量測定装置２で質量（Ａ
ｇ）を測定した
吸水率（Ｑ）は、式Ｑ＝（Ａ−Ｂ）／Ｂ×１００（％）
により求められる。この処理の所要時間は、乾燥炉を用
いても１日〜２日程度であり、高周波加熱装置を使用す
ると１２０分程度であった。After sufficiently absorbing water, the aggregate is taken out from the container 5, the water film on the surface of the aggregate is wiped, and the mass (A
The water absorption rate (Q) obtained by measuring g) is calculated by the formula Q = (AB) / B × 100 (%).
Required by. The time required for this treatment was about 1 to 2 days even using the drying furnace, and about 120 minutes using the high frequency heating device.
【００１８】[0018]
【発明の効果】本発明は、次のような効果を得ることが
できる。
＜イ＞本発明は、骨材、特に多孔質骨材の吸水率を迅速
に測定することができる。
＜ロ＞また、本発明は、今後、急速に進む再生骨材や天
然低品質骨材などの多孔質骨材の品質管理を容易に行う
ことができる。
＜ハ＞また、本発明は、圧力吸水を基本原理にしている
ため、ポンプ圧送などによるコンクリートのスランプロ
スをコントロールできる。
＜ニ＞また、本発明は、減圧工法製造コンクリートの練
り上がり状態の品質管理に利用できる。According to the present invention, the following effects can be obtained. <A> In the present invention, the water absorption of an aggregate, particularly a porous aggregate, can be quickly measured. <B> Further, in the present invention, it is possible to easily perform quality control of porous aggregates such as recycled aggregates and natural low-quality aggregates, which will rapidly progress in the future. <C> Further, since the present invention is based on the principle of pressure absorption, it is possible to control the slump loss of concrete due to pumping or the like. <D> Further, the present invention can be used for quality control of a kneaded state of concrete manufactured by a decompression method.
【図１】吸水率の測定図[Figure 1] Measurement diagram of water absorption
【図２】吸水率測定経過における骨材の吸水率の変化を
示す図FIG. 2 is a diagram showing changes in the water absorption rate of the aggregate during the water absorption rate measurement process.
【図３】従来の吸水方法による骨材の吸水率の変化を示
す図FIG. 3 is a diagram showing changes in water absorption rate of an aggregate by a conventional water absorption method.
１・・・乾燥装置 ２・・・質量測定装置 ３・・・加圧吸水装置 ４・・・計算装置 ５・・・容器 1 ... Drying device 2 ... Mass measuring device 3 ... Pressurized water absorption device 4 ... Computing device 5 ... Container
───────────────────────────────────────────────────── フロントページの続き 特許法第30条第１項適用申請有り ３．「日刊工業新聞 社」平成11年11月４日付日刊工業新聞社発行において発 表 特許法第30条第１項適用申請有り ４．「建設通信新 聞」平成11年11月４日付日刊建設通信新聞社発行におい て発表 特許法第30条第１項適用申請有り ５．「日刊建設産業 新聞」平成11年11月４日付日刊建設産業新聞社発行にお いて発表 特許法第30条第１項適用申請有り ６．組刊建設工業新 聞」平成11年11月４日付日刊建設工業新聞社発行におい て発表 (56)参考文献 特開 昭61−133860（ＪＰ，Ａ) 特開 昭59−131164（ＪＰ，Ａ) 特開 昭63−111014（ＪＰ，Ａ) 真野孝次，高強度人工骨材を用いたコ ンクリートの研究，日本建築学会学術講 演梗概集，日本，2001年 ９月，291− 292 松村仁夫，減圧吸水法による細骨材の 密度・吸水率測定の問題点，土木学会第 54回年次学術講演会，日本，1999年 ９ 月，12−13 村松仁夫，減圧吸水法による各種細骨 材の比重および吸水率の測定，土木学会 第53回年次学術講演会，日本，1998年10 月，478−479 今本啓一，再生骨材の迅速吸水率試験 と実機プラントにおける品質管理，コン クリート工学年次論文集，日本，2000 年，Ｖｏｌ．22，ＮＯ．２，1201−1206 (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 33/38 B28C 7/00 C04B 18/16 ZAB G01N 5/04 ─────────────────────────────────────────────────── ─── Continuation of front page Application for application of Article 30 (1) of the Patent Act 3. 3. Published by Nikkan Kogyo Shimbun on November 4, 1999, published by Nikkan Kogyo Shimbun. There is an application for applying Article 30 (1) of the Patent Law. "Construction Newspaper" announced on November 4, 1999, published by Nikkan Kenjitsu Newspaper Inc. Application for application of Article 30, Paragraph 1 of the Patent Law 5. "Nikkan Kensetsu Sangyo Shimbun" announced on November 4, 1999, published by Nikkan Kensetsu Sangyo Shimbun. Application for application of Article 30 (1) of the Patent Law 6. Published by Nikkan Kogyo Kogyo Shimbun on November 4, 1999 (56) References JP-A-61-133860 (JP, A) JP-A-59-131164 (JP, A) JP-A Sho 63-111014 (JP, A) Koji Mano, Research on concrete using high-strength artificial aggregate, Abstracts of lectures by the Architectural Institute of Japan, Japan, September 2001, 291-292 Matsumura, N., Reduced pressure absorption method Of Density and Water Absorption Rate of Fine Aggregate by SEM, The 54th Annual Scientific Lecture Meeting of Japan Society of Civil Engineers, Japan, September 1999, 12-13 N. Muramatsu, Specific gravity and water absorption of various fine aggregates by reduced pressure absorption method Rate measurement, 53rd Annual Scientific Lecture Meeting of Japan Society of Civil Engineers, Japan, October 1998, 478-479 Keiichi Imamoto, Rapid water absorption rate test of recycled aggregate and quality control in actual plant, Concrete engineering annual paper Shu, Japan, 2000, Vol. 22, NO. 2,1201-1206 (58) Fields investigated (Int.Cl. 7 , DB name) G01N 33/38 B28C 7/00 C04B 18/16 ZAB G01N 5/04
Claims (5)
ら骨材の吸水率を測定する測定装置において、 骨材の質量を測定する質量測定装置と、 骨材を乾燥する乾燥装置と、 水中に骨材を配置し加圧する加圧吸水装置とを備えてい
ることを特徴とする、骨材の吸水率を測定する測定装
置。1. A measuring device for measuring a water absorption rate of an aggregate based on a mass of the aggregate in a dry state and a mass of a water absorbing state, a mass measuring device for measuring a mass of the aggregate, and a drying device for drying the aggregate. A measuring device for measuring a water absorption rate of an aggregate, comprising: a pressurized water absorbing device which arranges and pressurizes the aggregate in water.
測定装置において、 乾燥装置は、高周波加熱装置であることを特徴とする、
骨材の吸水率を測定する測定装置。2. The measuring device for measuring the water absorption rate of an aggregate according to claim 1, wherein the drying device is a high-frequency heating device.
A measuring device for measuring the water absorption rate of aggregate.
ら骨材の吸水率を測定する測定方法において、 水中に骨材を配置し加圧し、吸水状態の骨材の質量を測
定し、骨材を乾燥し、乾燥状態の骨材の質量を測定す
る、又は、骨材を乾燥し、乾燥状態の骨材の質量を測定
し、水中に骨材を配置し加圧し、吸水状態の骨材の質量
を測定することを特徴とする、骨材の吸水率を測定する
測定方法。3. A method for measuring the water absorption rate of an aggregate from the mass of the aggregate in a dry state and the mass of a water absorbing state, wherein the aggregate is placed in water and pressurized to measure the mass of the aggregate in a water absorbing state. , Dry the aggregate and measure the mass of the dry aggregate, or dry the aggregate, measure the mass of the dry aggregate, place the aggregate in water, pressurize, in the water absorption state A measuring method for measuring the water absorption rate of an aggregate, which comprises measuring the mass of the aggregate.
測定方法において、 骨材の乾燥は、高周波加熱で乾燥することを特徴とす
る、骨材の吸水率を測定する測定方法。4. The measuring method for measuring the water absorption rate of an aggregate according to claim 3, wherein the drying of the aggregate is performed by high frequency heating, and the measuring method for measuring the water absorption rate of the aggregate. .
測定方法において、 骨材を水中に配置する際、蓄熱した状態の骨材を使用す
ることを特徴とする、骨材の吸水率を測定する測定方
法。5. The method for measuring the water absorption rate of an aggregate according to claim 3, characterized in that when the aggregate is placed in water, the aggregate in a heat-accumulated state is used. Measuring method to measure water absorption.
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Cited By (2)
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