JP3478160B2 - A method for predicting the useful life of lightweight cellular concrete - Google Patents
A method for predicting the useful life of lightweight cellular concreteInfo
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- JP3478160B2 JP3478160B2 JP08835699A JP8835699A JP3478160B2 JP 3478160 B2 JP3478160 B2 JP 3478160B2 JP 08835699 A JP08835699 A JP 08835699A JP 8835699 A JP8835699 A JP 8835699A JP 3478160 B2 JP3478160 B2 JP 3478160B2
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- carbonation
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- cellular concrete
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、建築物の壁や屋
根、床などに使用されるＡＬＣ（軽量気泡コンクリー
ト）の耐用年数の予測方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for predicting the service life of ALC (lightweight aerated concrete) used for walls, roofs and floors of buildings.
【０００２】[0002]
【従来の技術】補強用鉄筋を内蔵して、板状に形成した
ＡＬＣからなるＡＬＣパネルは、建築物の壁や屋根、床
などに使用される。ＡＬＣパネルの耐久性は、実際の使
用段階において最も重要な問題であり、耐用年数を予測
する方法が望まれている。2. Description of the Related Art ALC panels made of plate-shaped ALC having reinforcing bars built-in are used for walls, roofs and floors of buildings. The durability of the ALC panel is the most important issue in the actual use stage, and a method of predicting the service life is desired.
【０００３】該ＡＬＣパネルは、珪石等の珪酸質原料
と、セメントや生石灰等の石灰質原料とを主原料とし、
これらの微粉末に水とアルミニウム粉末等の添加物を加
えて、スラリー状とした後、補強用鉄筋を配置した型枠
内に流し込み、アルミニウム粉末の反応により発泡さ
せ、石灰質原料の反応により半硬化させて、所定寸法に
形成した後、オートクレーブによる高温高圧水蒸気養生
を行って製造される。該ＡＬＣパネルは、絶乾かさ比重
０．５程度の軽量で、耐火性、断熱性、施工性に優れて
いるため、建築材料として広く使用されている。The ALC panel is mainly composed of siliceous materials such as silica stone and calcareous materials such as cement and quicklime.
Water and aluminum powder and other additives are added to these fine powders to form a slurry, which is then poured into a formwork in which reinforcing bars are placed, foamed by the reaction of the aluminum powder, and semi-cured by the reaction of the calcareous raw material. Then, after being formed into a predetermined size, it is manufactured by performing high temperature high pressure steam curing by an autoclave. Since the ALC panel is lightweight with an absolute dry bulk density of about 0.5 and is excellent in fire resistance, heat insulation and workability, it is widely used as a building material.
【０００４】ＡＬＣパネルを使用する立場から判断する
際、ＡＬＣにひび割れが発生したり、パネル強度が低下
した場合に、ＡＬＣの耐久性は劣化したと認識される。
これは、特に、製造時からの年数が分からないＡＬＣに
対しては、有効な判断手段となる。ＡＬＣの耐久性が劣
化する要因、言い換えるとひび割れの発生やパネル強度
低下の要因は、外的な要因と内的な要因に大別される。When judging from the standpoint of using the ALC panel, it is recognized that the durability of the ALC is deteriorated when the ALC is cracked or the panel strength is lowered.
This is an effective judgment means especially for ALC whose years from the time of manufacture are unknown. The factors that deteriorate the durability of the ALC, in other words, the factors that cause cracking and decrease the panel strength are roughly classified into external factors and internal factors.
【０００５】外的な要因とは、地震や躯体の変形、風圧
などである。これらは、建物の設計や不可避な自然現象
が原因であり、ＡＬＣ自身の問題である場合は少ない。
一方、内的な要因としては、凍害、塩害、炭酸化、乾燥
収縮等が考えられる。External factors include an earthquake, deformation of a skeleton, wind pressure, and the like. These are caused by the design of the building and inevitable natural phenomena, and are rarely problems of ALC itself.
On the other hand, internal factors include frost damage, salt damage, carbonation, drying shrinkage and the like.
【０００６】内的な要因の中で凍害は、寒冷地特有のも
のであり、仕上げやシーリング、窓周りなどの施工方法
によって回避できることから、ＡＬＣ自身の問題ではな
い場合が多い。Of the internal factors, frost damage is peculiar to cold regions and can be avoided by a construction method such as finishing, sealing, and window surroundings, so it is often not a problem of ALC itself.
【０００７】また、ＡＬＣパネルの内部補強用鉄筋には
予め防錆処理（鉄筋防錆）が施されており、塩水による
ＡＬＣの耐久性の劣化は、この鉄筋防錆が不十分である
場合に問題となる。従って、塩害は、正常に製造された
ＡＬＣパネルにおいて、ＡＬＣの耐久性を議論する場合
の要因としては適切でない。In addition, the reinforcing bars for internal reinforcement of the ALC panel have been previously subjected to anticorrosion treatment (corrosion prevention), and the deterioration of the durability of the ALC due to salt water is caused when the anticorrosion is insufficient. It becomes a problem. Therefore, salt damage is not appropriate as a factor when discussing the durability of ALC in a normally manufactured ALC panel.
【０００８】炭酸化とは、ＡＬＣの主要鉱物であるトバ
モライトが、炭酸ガスと水分が存在する環境下で、シリ
カゲルと炭酸カルシウムに分解する反応であり、仕上げ
等の施工が適切に施された場合にも、徐々に進行するこ
とが知られている。また、炭酸化することによりＡＬＣ
は収縮し（炭酸化収縮）、さらに炭酸化したＡＬＣは乾
燥収縮率が大きくなり、乾燥収縮と湿潤膨張の繰り返し
によるひび割れの発生やパネル強度の低下につながるこ
とが懸念される。そこで、ＡＬＣ自身の問題となる劣化
要因としては、炭酸化とそれに伴う長さ変化（炭酸化収
縮と乾燥収縮）に注目することが必要である。Carbonation is a reaction in which tobermorite, which is the main mineral of ALC, is decomposed into silica gel and calcium carbonate in an environment where carbon dioxide gas and water are present. However, it is known that it will progress gradually. In addition, by carbonating ALC
Is contracted (carbonation contraction), and further the carbonized ALC has a large dry contraction rate, which may cause cracking due to repeated dry contraction and wet expansion and a decrease in panel strength. Therefore, it is necessary to pay attention to carbonation and its accompanying change in length (carbonation contraction and drying contraction) as a deterioration factor which is a problem of ALC itself.
【０００９】しかし、これまでＡＬＣの炭酸化と劣化の
関係についてはほとんど分かっていない。従って、ＡＬ
Ｃの耐久性に基づいて、耐用年数を予測する方法は確立
されておらず、建築物の設計者や使用者は、どの程度の
経過年数で建て替え、リフォーム、補修などを行えば良
いのかが正確には分からなかった。However, until now, little has been known about the relationship between carbonation and deterioration of ALC. Therefore, AL
A method for predicting the service life based on the durability of C has not been established, and it is accurate for the designers and users of buildings to know how many years have passed before rebuilding, remodeling, or repairing. I didn't understand.
【００１０】[0010]
【発明が解決しようとする課題】このような従来の事情
に鑑み、本発明者らは、ＡＬＣの炭酸化の進行と劣化の
関係を明らかにし、非常に簡便で迅速な方法により、Ａ
ＬＣの耐用年数を予測する方法を提供することを目的と
する。In view of the above conventional circumstances, the present inventors have clarified the relationship between the progress of ALC carbonation and the deterioration thereof, and by using a very simple and rapid method,
It is intended to provide a method of predicting the useful life of LC.
【００１１】[0011]
【課題を解決するための手段】本発明の軽量気泡コンク
リートの耐用年数予測方法では、建築後、補修されずに
Ｘ年経過した軽量気泡コンクリートにおいて、全酸化カ
ルシウム含有量（重量％）、および６００〜９００℃に
おける重量減少量に相当する炭酸ガス含有量（重量％）
を測定し、｛（炭酸ガス含有量）×５６／４４｝／（全
酸化カルシウム含有量）×１００なる式で得られる炭酸
化度が、Ｙ（％）である軽量気泡コンクリートは、５０
Ｘ／Ｙ（年）の耐用年数を有し、５０Ｘ／Ｙ−Ｘ（年）
の余命であると予測する。According to the method of predicting the useful life of a lightweight cellular concrete of the present invention, the total content of calcium oxide (% by weight) and 600 in the lightweight cellular concrete which has not been repaired and X years have passed after construction. Carbon dioxide gas content (% by weight) corresponding to the weight loss at 900 ° C
And the degree of carbonation obtained by the formula {(carbon dioxide content) × 56/44} / (total calcium oxide content) × 100 is Y (%) is 50%.
Has a useful life of X / Y (year), 50X / Y-X (year)
Predict the life expectancy of.
【００１２】また、建築後、Ｘ2 年経過した軽量気泡コ
ンクリートにおいて、炭酸化度がＹ2 （％）であり、最
新の補修より後で、建築後Ｘ1 年経過した時の炭酸化度
がＹ1 （％）である軽量気泡コンクリートは、｛（Ｘ2
−Ｘ1 ）／（Ｙ2 −Ｙ1 ）｝×（５０−Ｙ2 ）＋Ｘ
2 （年）の耐用年数を有し、｛（Ｘ2 −Ｘ1 ）／（Ｙ2
−Ｙ1 ）｝×（５０−Ｙ2 ）（年）の余命であると予測
する。炭酸化度の測定は、前述と同様に行う。In addition, the lightweight cellular concrete X 2 years after construction has a carbonation degree of Y 2 (%), and the carbonation degree X 1 year after construction after the latest repair is The lightweight cellular concrete with Y 1 (%) is {(X 2
-X 1) / (Y 2 -Y 1)} × (50-Y 2) + X
Has a useful life of 2 (years), {(X 2 -X 1 ) / (Y 2
-Y 1 )} × (50−Y 2 ) (year). The carbonation degree is measured as described above.
【００１３】以上の式において、負の年数の余命が算出
された場合は、既に耐用年数をすぎたものと判断され
る。In the above equation, when the life expectancy of a negative number of years is calculated, it is judged that the useful life has already passed.
【００１４】[0014]
【発明の実施の形態】本発明者らは、ＡＬＣの炭酸化と
耐久性の劣化との関係を調べるため、実際の建物からＡ
ＬＣパネルを取り外し、様々な調査分析を行った。BEST MODE FOR CARRYING OUT THE INVENTION In order to investigate the relationship between carbonation of ALC and deterioration of durability, the inventors of the present invention used an A
The LC panel was removed and various research analyzes were performed.
【００１５】建物履歴として、建築年、部位、方角、建
築時の仕上げ、仕上げ補修とその内容を調べた。As the building history, the year of construction, site, direction, finishing at the time of construction, finishing repair and their contents were examined.
【００１６】外観調査として、各ＡＬＣパネルの表裏面
におけるひび割れの有無を目視により確認した。ここ
で、地震や躯体の変形によると思われる大きなひび割れ
は対象とせず、網目状のひび割れだけを対象とした。As a visual inspection, the presence or absence of cracks on the front and back surfaces of each ALC panel was visually confirmed. Here, we did not target large cracks that might be caused by an earthquake or deformation of the skeleton, but only meshed cracks.
【００１７】炭酸化度は、パネルの厚さ方向に５層に均
等に分割し、屋外側表面層について、全酸化カルシウム
（ＣａＯ）含有量（重量％）を、化学分析法（ＩＣＰ−
ＡＥＳ）で測定し、炭酸ガス（ＣＯ2 ）含有量（重量
％）を、熱分析法、具体的には熱重量−示差熱分析装置
（ＴＧ−ＤＴＡ）による６００〜９００℃の減少重量か
ら算出し、下式（数１）から求めた。The degree of carbonation was equally divided into 5 layers in the thickness direction of the panel, and the total calcium oxide (CaO) content (% by weight) in the outdoor side surface layer was determined by a chemical analysis method (ICP-
AES), and the carbon dioxide (CO 2 ) content (% by weight) is calculated from the weight loss from 600 to 900 ° C. by a thermal analysis method, specifically, a thermogravimetric-differential thermal analyzer (TG-DTA). Then, it was calculated from the following formula (Equation 1).
【００１８】[0018]
【数１】炭酸化度（％）＝｛（炭酸ガス含有量）×５６
／４４｝／（全酸化カルシウム含有量）×１００## EQU1 ## Carbonation degree (%) = {(carbon dioxide gas content) × 56
/ 44} / (total calcium oxide content) x 100
【００１９】実際の診断のための測定では、ＡＬＣパネ
ルの屋外側表面部分からサンプリングするので、本実施
例では、前記のように５層に分割したうち、屋外側表面
層のサンプルから得られた炭酸化度について測定した。In the actual measurement for diagnosis, sampling is performed from the outdoor side surface portion of the ALC panel. Therefore, in this example, the sample was obtained from the outdoor side surface layer among the five layers as described above. The degree of carbonation was measured.
【００２０】図１に、ＡＬＣパネル経過年数と、屋外側
表面部分の炭酸化度の関係を、ひび割れの有無の分類と
共に示す。経過年数につれて、炭酸化度が５０％までは
直線的に増加し、その後炭酸化度の増加は緩やかにな
り、炭酸化度６０％で飽和して、それ以上には増加して
いない。ひび割れの有無の観点からは、炭酸化度５０〜
６０％のサンプルのすべてにひび割れが発生しており、
炭酸化度０〜５０％のサンプルにはひび割れが発生して
いなかった。FIG. 1 shows the relationship between the age of the ALC panel and the carbonation degree of the surface portion on the outdoor side together with the classification of presence or absence of cracks. The degree of carbonation increases linearly up to 50% with the lapse of years, and thereafter, the degree of carbonation gradually increases, becomes saturated at the degree of carbonation of 60%, and does not increase further. From the viewpoint of the presence or absence of cracks, the carbonation degree is 50-
All 60% of the samples are cracked,
No cracks were generated in the samples having a carbonation degree of 0 to 50%.
【００２１】すなわち、炭酸化度が５０％以上であるＡ
ＬＣパネルではすべてひび割れが発生しており、劣化し
ていると判断される。また、劣化する時点までは、経過
年数にほぼ比例して炭酸化度が増加することが分かっ
た。That is, A having a carbonation degree of 50% or more
All of the LC panels had cracks and were judged to be deteriorated. It was also found that the degree of carbonation increases almost in proportion to the number of years elapsed until it deteriorates.
【００２２】様々な条件において、炭酸化度が５０％ま
では、炭酸化度が経過年数にほぼ比例して増加するかど
うかを確認するため、ＡＬＣを促進炭酸化試験に供し、
経過時間に対する炭酸化度の変化を調べた。Under various conditions, ALC was subjected to an accelerated carbonation test in order to confirm whether or not the carbonation degree increased substantially in proportion to the elapsed years up to a carbonation degree of 50%.
The change in carbonation degree with time was examined.
【００２３】図２に、３種類の条件で、具体的には温度
２０℃、相対湿度９０％、炭酸ガス３体積％の条件、温
度２０℃、相対湿度７０％、炭酸ガス３体積％の条件、
および温度２０℃、相対湿度７０％、炭酸ガス１体積％
の条件で、促進炭酸化させたＡＬＣの経過日数に対する
炭酸化度の変化を示す。図２から、どの条件において
も、炭酸化度５０％までは直線的に増加し、それ以降、
炭酸化度の増加は緩やかとなり、炭酸化度は６０％で飽
和して、６０％以上には増加しなかった。FIG. 2 shows three kinds of conditions, specifically, a temperature of 20 ° C., a relative humidity of 90% and a carbon dioxide gas of 3% by volume, and a temperature of 20 ° C., a relative humidity of 70% and a carbon dioxide of 3% by volume. ,
And temperature 20 ° C, relative humidity 70%, carbon dioxide 1% by volume
The change of the carbonation degree with respect to the elapsed days of ALC which accelerated carbonation was shown on condition of. From FIG. 2, under any condition, the carbonation degree increases linearly up to 50%, and thereafter,
The increase in the carbonation degree was moderate, the carbonation degree was saturated at 60%, and did not increase to more than 60%.
【００２４】この結果から、ある一定条件において使用
されるＡＬＣの炭酸化度の増加分は、経過時間に比例す
ると考えられる。つまり、図３に示すように、建築後に
補修を施されていないＡＬＣの炭酸化度は、経過年数に
比例し、炭酸化度が５０％に達するまで該比例関係が一
様であり、炭酸化度が５０％に達すると、耐用年数を超
過したと考えられる。From this result, it is considered that the increment of carbonation degree of ALC used under a certain constant condition is proportional to the elapsed time. That is, as shown in FIG. 3, the carbonation degree of ALC that has not been repaired after construction is proportional to the number of years elapsed, and the proportionality is uniform until the carbonation degree reaches 50%. When the degree reaches 50%, it is considered that the service life has been exceeded.
【００２５】従って、補修を行わなかった軽量気泡コン
クリートにおいて、本発明の耐用年数予測方法は、次の
ようになる。Therefore, in the lightweight cellular concrete which has not been repaired, the service life prediction method of the present invention is as follows.
【００２６】建築後、補修されずにＸ年経過した軽量気
泡コンクリートにおいて、全酸化カルシウム含有量（重
量％）、および６００〜９００℃における重量減少量に
相当する炭酸ガス含有量（重量％）を測定し、｛（炭酸
ガス含有量）×５６／４４｝／（全酸化カルシウム含有
量）×１００なる式で得られる炭酸化度が、Ｙ（％）で
ある軽量気泡コンクリートは、５０Ｘ／Ｙ（年）の耐用
年数を有し、５０Ｘ／Ｙ−Ｘ（年）の余命であると予測
する。In the lightweight cellular concrete that has not been repaired for X years after construction, the total calcium oxide content (% by weight) and the carbon dioxide gas content (% by weight) corresponding to the weight reduction amount at 600 to 900 ° C. are determined. A lightweight cellular concrete having a carbonation degree of Y (%) measured by the formula {(carbon dioxide gas content) × 56/44} / (total calcium oxide content) × 100 is 50X / Y ( It has a useful life of (year) and is expected to have a life expectancy of 50X / Y-X (year).
【００２７】さらに、図４に示すように、建築後に補修
を施されたＡＬＣの炭酸化度は、補修を施されるまでの
経過年数に比例し、補修を施された後の経過年数に比例
した炭酸化度が加わると考えられる。従って、最新の補
修以降の比例関係により、炭酸化度が５０％に達する
と、耐用年数を超過したと考えられる。Further, as shown in FIG. 4, the carbonation degree of the ALC repaired after construction is proportional to the number of years elapsed until the repair is performed, and is proportional to the number of years elapsed after the repair is performed. It is considered that the degree of carbonation is added. Therefore, it is considered that the service life was exceeded when the carbonation degree reached 50% due to the proportional relationship since the latest repair.
【００２８】従って、補修を行った軽量気泡コンクリー
トにおいて、本発明の耐用年数予測方法は、次のように
なる。Therefore, in the repaired lightweight cellular concrete, the service life prediction method of the present invention is as follows.
【００２９】建築後、Ｘ2 年経過した軽量気泡コンクリ
ートにおいて、炭酸化度がＹ2 （％）であり、最新の補
修より後で、建築後Ｘ1 年経過した時の炭酸化度がＹ1
（％）である軽量気泡コンクリートは、｛（Ｘ2 −
Ｘ1 ）／（Ｙ2 −Ｙ1 ）｝×（５０−Ｙ2 ）＋Ｘ
2 （年）の耐用年数を有し、｛（Ｘ2 −Ｘ1 ）／（Ｙ2
−Ｙ1 ）｝×（５０−Ｙ2 ）（年）の余命であると予測
する。炭酸化度の測定は、前述と同様に行う。The carbonation degree is Y 2 (%) in the lightweight cellular concrete X 2 years after the construction, and the carbonation degree Y 1 year after the construction is Y 1 after the latest repair.
(%) Lightweight cellular concrete is {(X 2 −
X 1) / (Y 2 -Y 1)} × (50-Y 2) + X
Has a useful life of 2 (years), {(X 2 -X 1 ) / (Y 2
-Y 1 )} × (50−Y 2 ) (year). The carbonation degree is measured as described above.
【００３０】本発明の耐用年数の予測方法の利点は、少
量のサンプリングにより、迅速、簡便に耐用年数の予測
が正確にできることにある。The advantage of the method of predicting the useful life of the present invention is that the useful life can be accurately predicted quickly and easily by sampling a small amount.
【００３１】[0031]
【発明の効果】以上詳細に説明したように、本発明の方
法によれば、少量のサンプリングにより、迅速、簡便に
耐用年数の予測が正確にできる。As described in detail above, according to the method of the present invention, the useful life can be accurately predicted quickly and easily by a small amount of sampling.
【００３２】補修を行っていなければ、１回の測定で耐
用年数が正確に予測でき、経過年数を引いた余命によ
り、建築物の保守計画を効果的にかつ合理的に立案でき
るという特徴を有する。If no repair is performed, the service life can be accurately predicted by one measurement, and the maintenance plan of the building can be effectively and reasonably planned due to the remaining life minus the elapsed years. .
【００３３】補修を行っていても、補修内容の検討など
を必要とせずに、一定期間を跨いで２回の測定を実施す
れば耐用年数が正確に予測できるという顕著な効果を有
する。Even if the repair is performed, there is a remarkable effect that the service life can be accurately predicted by performing the measurement twice over a certain period without the need to examine the repair content.
【図面の簡単な説明】[Brief description of drawings]
【図１】 ＡＬＣパネル経過年数と、屋外側表面部分の
ＡＬＣの炭酸化度と、ひび割れの有無との関係を示す相
関図である。FIG. 1 is a correlation diagram showing the relationship between the age of an ALC panel, the carbonation degree of ALC on the outdoor surface portion, and the presence or absence of cracks.
【図２】 促進炭酸化されたＡＬＣの経過日数に対する
炭酸化度の変化を示すグラフである。FIG. 2 is a graph showing changes in carbonation degree with respect to the elapsed days of ALC that has been subjected to accelerated carbonation.
【図３】 建築後に補修を行わなかったＡＬＣの経過年
数に対する炭酸化度の変化の模式図である。FIG. 3 is a schematic diagram of changes in carbonation degree with respect to the number of years of ALC that has not been repaired after construction.
【図４】 建築後に補修を行ったＡＬＣの経過年数に対
する炭酸化度の変化の模式図である。FIG. 4 is a schematic diagram of changes in carbonation degree with respect to the number of years of ALC repaired after construction.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01M 19/00 G01N 33/38 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) G01M 19/00 G01N 33/38
Claims (4)
気泡コンクリートにおいて、全酸化カルシウム含有量
（重量％）、および６００〜９００℃における重量減少
量に相当する炭酸ガス含有量（重量％）を測定し、
｛（炭酸ガス含有量）×５６／４４｝／（全酸化カルシ
ウム含有量）×１００なる式で得られる炭酸化度がＹ
（％）である軽量気泡コンクリートは、５０Ｘ／Ｙ
（年）の耐用年数を有すると予測する耐用年数予測方
法。1. In a lightweight cellular concrete that has not been repaired for X years after construction, the total calcium oxide content (% by weight) and the carbon dioxide gas content (% by weight) corresponding to the weight reduction amount at 600 to 900 ° C. ) Is measured,
The degree of carbonation obtained by the formula {(carbon dioxide content) × 56/44} / (total calcium oxide content) × 100 is Y
(%) Lightweight cellular concrete is 50X / Y
A service life prediction method for predicting a service life of (year).
気泡コンクリートにおいて、全酸化カルシウム含有量
（重量％）、および６００〜９００℃における重量減少
量に相当する炭酸ガス含有量（重量％）を測定し、
｛（炭酸ガス含有量）×５６／４４｝／（全酸化カルシ
ウム含有量）×１００なる式で得られる炭酸化度がＹ
（％）である軽量気泡コンクリートは、５０Ｘ／Ｙ−Ｘ
（年）の余命であると予測する耐用年数予測方法。2. In a lightweight cellular concrete that has not been repaired for X years after construction, the total calcium oxide content (% by weight) and the carbon dioxide gas content (% by weight) corresponding to the weight reduction amount at 600 to 900 ° C. ) Is measured,
The degree of carbonation obtained by the formula {(carbon dioxide content) × 56/44} / (total calcium oxide content) × 100 is Y
(%) Lightweight cellular concrete is 50X / Y-X
A method for predicting the life expectancy of (years).
リートにおいて、全酸化カルシウム含有量（重量％）、
および６００〜９００℃における重量減少量に相当する
炭酸ガス含有量（重量％）を測定し、｛（炭酸ガス含有
量）×５６／４４｝／（全酸化カルシウム含有量）×１
００なる式で得られる炭酸化度がＹ2（％）であり、最
新の補修より後で、建築後Ｘ1 年経過した時の炭酸化度
がＹ1（％）である軽量気泡コンクリートは、｛（Ｘ2
−Ｘ1 ）／（Ｙ2 −Ｙ1 ）｝×（５０−Ｙ2 ）＋Ｘ
2 （年）の耐用年数を有すると予測する耐用年数予測方
法。3. A lightweight cellular concrete X 2 years after the construction, the total calcium oxide content (% by weight),
And the carbon dioxide content (% by weight) corresponding to the weight reduction amount at 600 to 900 ° C. was measured and {(carbon dioxide content) × 56/44} / (total calcium oxide content) × 1
The lightweight cellular concrete whose carbonation degree obtained by the formula 00 is Y 2 (%) and whose carbonation degree is Y 1 (%) at the time of X 1 year after construction after the latest repair is {(X 2
-X 1) / (Y 2 -Y 1)} × (50-Y 2) + X
A service life prediction method that predicts that the service life will be 2 (years).
リートにおいて、全酸化カルシウム含有量（重量％）、
および６００〜９００℃における重量減少量に相当する
炭酸ガス含有量（重量％）を測定し、｛（炭酸ガス含有
量）×５６／４４｝／（全酸化カルシウム含有量）×１
００なる式で得られる炭酸化度がＹ2（％）であり、最
新の補修より後で、建築後Ｘ1 年経過した時の炭酸化度
がＹ1（％）である軽量気泡コンクリートは、｛（Ｘ2
−Ｘ1 ）／（Ｙ2 −Ｙ1 ）｝×（５０−Ｙ2 ）（年）の
余命であると予測する耐用年数予測方法。4. The total content of calcium oxide (% by weight) in lightweight cellular concrete X 2 years after construction,
And the carbon dioxide content (% by weight) corresponding to the weight reduction amount at 600 to 900 ° C. was measured and {(carbon dioxide content) × 56/44} / (total calcium oxide content) × 1
The lightweight cellular concrete whose carbonation degree obtained by the formula 00 is Y 2 (%) and whose carbonation degree is Y 1 (%) at the time of X 1 year after construction after the latest repair is {(X 2
-X 1 ) / (Y 2 -Y 1 )} × (50-Y 2 ) (year) Life expectancy predicting method for predicting the remaining life.
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|---|---|---|---|
| JP08835699A JP3478160B2 (en) | 1999-03-30 | 1999-03-30 | A method for predicting the useful life of lightweight cellular concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08835699A JP3478160B2 (en) | 1999-03-30 | 1999-03-30 | A method for predicting the useful life of lightweight cellular concrete |
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| JP3478160B2 true JP3478160B2 (en) | 2003-12-15 |
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| JP3490975B2 (en) * | 2001-01-10 | 2004-01-26 | 関西ペイント株式会社 | Deterioration prediction method for building exterior materials |
| JP3519383B2 (en) * | 2001-07-25 | 2004-04-12 | 住友金属鉱山シポレックス株式会社 | Deterioration diagnosis system for lightweight cellular concrete panels |
| JP3988688B2 (en) * | 2003-06-27 | 2007-10-10 | 株式会社大林組 | Concrete crack diagnostic apparatus and method, computer program, computer-readable recording medium |
| CN101377464B (en) * | 2008-09-19 | 2010-06-02 | 孙炳全 | Method for non-destroyed real time continuously testing for concrete carbonization depth |
| JP5333775B2 (en) * | 2009-12-24 | 2013-11-06 | 住友金属鉱山シポレックス株式会社 | Degradation diagnosis method for lightweight cellular concrete horizontal members |
| JP2014190903A (en) * | 2013-03-28 | 2014-10-06 | Clion Co Ltd | Calculation method of carbonation degree of light-weight air bubble concrete panel |
| JP2016139429A (en) * | 2016-03-24 | 2016-08-04 | 日本建築検査協会株式会社 | Concrete building useful life calculation method, concrete building useful life calculation program, and concrete building useful life calculation device |
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| JPH0552840A (en) * | 1991-08-27 | 1993-03-02 | Misawa Homes Co Ltd | Method for measuring carbonating degree of concrete building material |
| JPH05310480A (en) * | 1992-05-12 | 1993-11-22 | Asahi Chem Ind Co Ltd | Lightweight cellular concrete excellent in performance of carbonatization resistance |
| JPH1021211A (en) * | 1996-06-28 | 1998-01-23 | Taisei Corp | Neural network, evaluating method and predicting method of corrosion of reinforcing bar in concrete structure |
| JP3451617B2 (en) * | 1998-10-22 | 2003-09-29 | 住友金属鉱山株式会社 | Deterioration quantitative evaluation method of steam cured lightweight cellular concrete |
| JP3451616B2 (en) * | 1998-12-14 | 2003-09-29 | 住友金属鉱山株式会社 | Durability diagnostic method for lightweight cellular concrete |
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