JPH04310556A - Production of lightweight aerated concrete - Google Patents
Production of lightweight aerated concreteInfo
- Publication number
- JPH04310556A JPH04310556A JP3071684A JP7168491A JPH04310556A JP H04310556 A JPH04310556 A JP H04310556A JP 3071684 A JP3071684 A JP 3071684A JP 7168491 A JP7168491 A JP 7168491A JP H04310556 A JPH04310556 A JP H04310556A
- Authority
- JP
- Japan
- Prior art keywords
- aerated concrete
- powder
- lightweight aerated
- water
- raw material
- 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.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000004567 concrete Substances 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000000843 powder Substances 0.000 claims abstract description 33
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 239000004094 surface-active agent Substances 0.000 claims abstract description 21
- 239000007787 solid Substances 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 7
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims description 10
- 239000004088 foaming agent Substances 0.000 claims description 4
- 239000002002 slurry Substances 0.000 abstract description 22
- 239000002253 acid Substances 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 abstract description 4
- 239000006260 foam Substances 0.000 abstract description 3
- 239000004604 Blowing Agent Substances 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 6
- 238000004898 kneading Methods 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 4
- 239000011381 foam concrete Substances 0.000 description 4
- 238000005187 foaming Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010097 foam moulding Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002699 waste material Substances 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
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Producing Shaped Articles From Materials (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、軽量気泡コンクリート
粉を原料に回収使用する場合に、均質な気泡を有する軽
量気泡コンクリートを合理的且つ容易に製造する方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for rationally and easily producing lightweight cellular concrete having homogeneous cells when lightweight cellular concrete powder is recovered and used as a raw material.
【０００２】0002
【従来の技術】軽量気泡コンクリート（以下ＡＬＣと略
記する）は、珪石，珪砂等の珪酸質原料と、石灰やセメ
ント等の石灰質原料を適当な水と共に混合してスラリー
としたものに金属アルミニューム粉末等の発泡剤を加え
て発泡半硬化させたものを、ピアノ線カッター等の切断
機で所定の寸法に切断した後、これをオートクレーブに
より高温高圧水蒸気養生させることにより、安定な石灰
−珪酸化合物を生成させて強固な硬化物を得るものであ
る。このようにして得られた硬化物は、強度，断熱性，
耐火性，軽量性，加工性等に優れていることから、近年
、建築材料として大きく成長している。[Prior Art] Lightweight aerated concrete (hereinafter abbreviated as ALC) is a slurry made by mixing silicic raw materials such as silica stone and silica sand, and calcareous raw materials such as lime and cement with appropriate water, and then adding metal aluminum to the slurry. A stable lime-silicate compound is produced by adding a foaming agent such as powder and semi-curing the foam, cutting it into specified dimensions using a cutting machine such as a piano wire cutter, and then curing it with high temperature and high pressure steam in an autoclave. is produced to obtain a strong cured product. The cured product obtained in this way has strength, heat insulation properties,
Due to its excellent fire resistance, light weight, workability, etc., it has grown significantly as a building material in recent years.
【０００３】ＡＬＣの製造に当たって、原料混合スラリ
ーに金属アルミニューム粉等の発泡剤を加えて発泡半硬
化させる場合、均質な気泡を形成させるためにはスラリ
ーの粘性を充分小さくする必要がある。そのために混水
量を多くする方法が一般的に採用されている。しかしな
がら、水分／固形分比を大きくとると、硬化体中のアル
ミニューム粉発泡による気泡（以下、単に気泡と記す）
が少なくなり、水和跡の細孔（以下、単に細孔と記す）
が多くなり、吸水性が増す等の弊害が出て来る。又、混
水量を多くすると、系中の自由水が増加すること、熱容
量が増大し半硬化体の温度上昇が小さくなること等によ
り、所定の硬さになるまでの硬化時間が長くなり、生産
性の低下を引き起こしている。特に、オートクレーブで
高温高圧水蒸気養生を行った硬化体の端材や屑を粉砕し
て、原料に回収使用するとスラリーの粘性を上昇せしめ
均質な発泡を阻害し、気泡斑，内部空洞等の欠陥を発生
させ、良好な硬化体が得られない。そして、粘性を維持
するために混水量を増すと、水和跡の細孔の量が増加し
、吸水性等の一部の製品性能の低下を引き起こす、又、
混水量の増加に伴う熱容量の増大により、半硬化体の温
度上昇が小さくなり、硬化が遅延されるという問題が生
ずるため、ＡＬＣ粉の回収使用量は、総固形分に対して
数ｗｔ％程度に制限され、廃棄物低減の障害にもなって
いる。[0003] When producing ALC, when a foaming agent such as metal aluminum powder is added to a raw material mixed slurry to foam and semi-cure, the viscosity of the slurry must be sufficiently reduced in order to form homogeneous cells. For this purpose, a method of increasing the amount of mixed water is generally adopted. However, when the water/solid content ratio is high, air bubbles (hereinafter simply referred to as air bubbles) due to foaming of aluminum powder in the cured product
pores due to hydration (hereinafter simply referred to as pores)
This results in harmful effects such as increased water absorption. In addition, when the amount of mixed water is increased, the amount of free water in the system increases, the heat capacity increases, and the temperature rise of the semi-cured product becomes smaller, resulting in a longer curing time to reach the desired hardness, which reduces production. causing a decline in sexuality. In particular, if scraps and scraps from cured products cured with high-temperature and high-pressure steam in an autoclave are crushed and recovered for use as raw materials, the viscosity of the slurry will increase, inhibiting homogeneous foaming, and causing defects such as bubble spots and internal cavities. and a good cured product cannot be obtained. If the amount of mixed water is increased to maintain viscosity, the amount of pores remaining after hydration will increase, causing a decline in some product performance such as water absorption.
Due to the increase in heat capacity associated with the increase in the amount of mixed water, the temperature rise of the semi-cured product becomes smaller and curing is delayed, which causes the problem that the amount of ALC powder recovered and used is about several wt% based on the total solid content. It is also an obstacle to waste reduction.
【０００４】0004
【発明が解決しようとする課題】本発明の目的は、ＡＬ
Ｃ端材や屑から得られるＡＬＣ粉をＡＬＣ製造のための
原料に回収使用しても、上述の問題点の生じないＡＬＣ
を、生産性を低下させることなく製造する方法を提供す
ることである。[Problems to be Solved by the Invention] The purpose of the present invention is to
C. Even if ALC powder obtained from scraps and scraps is recovered and used as a raw material for ALC production, the above-mentioned problems will not occur.
An object of the present invention is to provide a method for manufacturing without reducing productivity.
【０００５】[0005]
【課題を解決するための手段】従来技術のかゝる問題点
を解決すべく鋭意研究を行った結果、多くの界面活性剤
の中で、ポリアルキルアリルスルフォン酸系界面活性剤
が優れた減水効果を有すること、アルミニューム発泡や
硬化，高温高圧水蒸気養生に対し悪影響を示さないこと
、又、ポリアルキルアリルスルフォン酸系界面活性剤を
用いることにより、ＡＬＣ粉を約３０％までは生産性，
及び製品性能を殆ど低下させることなく原料に回収使用
出来ることを見いだした。特にＡＬＣ粉の添加量が１０
％までは、硬化体の強度及び結晶性を向上させることが
出来た。[Means for solving the problem] As a result of intensive research to solve the problems of the conventional technology, we found that among many surfactants, polyalkylaryl sulfonic acid surfactants have excellent water-reducing effects. By using a polyalkylaryl sulfonic acid surfactant, the productivity of ALC powder can be improved by up to about 30%.
It was also discovered that the product could be recovered and used as a raw material without any deterioration in product performance. Especially when the amount of ALC powder added is 10
%, it was possible to improve the strength and crystallinity of the cured product.
【０００６】すなわち、本発明は、石灰質原料及び珪酸
質原料を主成分とする水スラリー状原料に発泡剤を混合
して、型枠内に供給して半硬化後に適当な大きさに切断
し、高温高圧養生を行い、軽量気泡コンクリートを製造
する方法に於いて、前記原料に、軽量気泡コンクリート
粉を総固形分の３０ｗｔ％以下添加し、且つ、ポリアル
キルアリルスルフォン酸系界面活性剤を、固形分に対し
０．０１〜１．０ｗｔ％添加することを特徴とする軽量
気泡コンクリート製造方法に係る。That is, in the present invention, a foaming agent is mixed with a water slurry-like raw material mainly composed of calcareous raw materials and silicic raw materials, and the mixture is fed into a mold, semi-hardened, and then cut into appropriate sizes. In the method of manufacturing lightweight cellular concrete by curing at high temperature and high pressure, lightweight cellular concrete powder is added to the raw material in an amount of 30 wt% or less of the total solid content, and a polyalkylaryl sulfonic acid surfactant is added to the solid material. It relates to a method for producing lightweight aerated concrete, characterized in that 0.01 to 1.0 wt% is added per minute.
【０００７】本発明で用いる石灰質原料及び珪酸質原料
を主成分とする水スラリー状原料とは、ＡＬＣの製造に
通常使用されるもので、たとえば、生石灰、セメント、
珪石粉、石膏等を適宜混合したものに、水とアルミニュ
ーム粉を加えてスラリーとしたものである。本発明のＡ
ＬＣ粉とは、通常の製法によって得られたＡＬＣパネル
の端材等を粉砕・調製して得られる。粒径は、特に限定
はないが１．２ｍｍアンダー程度が好ましい。ＡＬＣ粉
の調製方法には、乾式法と湿式法とがあり、いずれの方
法によって得られたＡＬＣ粉も本発明に使用しうる。こ
のうち乾式法を採用することにより、スラリーの粘性ア
ップをある程度改善することが出来るが、ＡＬＣ粉を乾
式粉砕するためには、水分率を３０％以下にまで乾燥す
る必要があり，乾燥整備、熱源等のコストアップ要素を
伴う。しかし、乾式法によっても、必ずしも満足いくも
のではなく、特にＡＬＣ粉を多量に添加する場合には、
混水量の増大は避けられない。そこで、混水量を低減す
るためには、所謂減水剤の使用が考えられるが、その効
果の程度，アルミニューム粉による発泡成型への影響，
硬化の遅延，オートクレーブ反応の阻害等の問題があっ
た。[0007] The water slurry-like raw materials mainly composed of calcareous raw materials and silicic raw materials used in the present invention are those commonly used in the production of ALC, such as quicklime, cement,
A slurry is made by adding water and aluminum powder to a mixture of silica powder, gypsum, etc. as appropriate. A of the present invention
LC powder is obtained by pulverizing and preparing scraps of ALC panels obtained by normal manufacturing methods. The particle size is not particularly limited, but is preferably about 1.2 mm or less. Methods for preparing ALC powder include a dry method and a wet method, and ALC powder obtained by either method can be used in the present invention. By adopting the dry method, it is possible to improve the viscosity of the slurry to some extent, but in order to dry-pulverize ALC powder, it is necessary to dry it to a moisture content of 30% or less. Involves cost-increasing factors such as heat sources. However, even the dry method is not always satisfactory, especially when adding a large amount of ALC powder.
An increase in the amount of mixed water is unavoidable. Therefore, in order to reduce the amount of mixed water, it is possible to use a so-called water-reducing agent, but the degree of effectiveness, the influence on foam molding by aluminum powder,
There were problems such as delayed curing and inhibition of autoclave reaction.
【０００８】本発明においては、数多くの界面活性剤の
中から、アルキルアリルスルフォン酸系界面活性剤は、
高混水量領域に対しても大きい減水効果を示すこと、Ａ
ＬＣを製造する上での上記の種々の悪影響を及ぼさない
ことを実験によりつき止めた。本発明に用いるポリアル
キルアリルスルフォン酸系界面活性剤の具体的な例とし
て、マイティー１５０（花王（株）製）がある。ポリア
ルキルアリルスルフォン酸系界面活性剤の添加量は、通
常、固形分基準で０．０１〜１．０ｗｔ％であり、特に
好ましくは０．０５〜０．５０ｗｔ％である。界面活性
剤の添加量が著しく少ない場合には、原料スラリーの減
水効果が小さく、又、過度に多く添加しても添加量に相
応した減水効果は得られない。In the present invention, among many surfactants, alkylarylsulfonic acid surfactants are
Showing a large water reduction effect even in high water mixing areas, A
Through experiments, it was determined that the above-mentioned various adverse effects on the production of LC were not caused. A specific example of the polyalkylaryl sulfonic acid surfactant used in the present invention is Mighty 150 (manufactured by Kao Corporation). The amount of polyalkylarylsulfonic acid surfactant added is usually 0.01 to 1.0 wt%, particularly preferably 0.05 to 0.50 wt%, based on solid content. If the amount of surfactant added is extremely small, the effect of reducing water in the raw material slurry is small, and even if it is added in an excessively large amount, the effect of reducing water in proportion to the amount added cannot be obtained.
【０００９】本発明のスラリーを発泡半硬化させる方法
は常法に従えばよい。例えば型枠にスラリーを注入し、
発泡半硬化を行う。発泡は通常、スラリーを型枠に注入
後直ぐ始まり、約３０分後に終了する。半硬化は、注入
後、２〜３時間経過してハンドリングに耐えられる所定
の硬度に達した時を以て終了とする。ピアノ線カッター
等の切断機で所定のサイズに切断した後、オートクレー
ブによる高温高圧水蒸気養生に供される。[0009] The slurry of the present invention may be foamed and semi-cured by a conventional method. For example, inject slurry into the formwork,
Perform foaming semi-curing. Foaming typically begins immediately after pouring the slurry into the mold and ends after about 30 minutes. Semi-curing is completed when a predetermined hardness that can withstand handling is reached 2 to 3 hours after injection. After cutting it into a predetermined size using a cutting machine such as a piano wire cutter, it is subjected to high-temperature, high-pressure steam curing in an autoclave.
【００１０】このようにして得られた硬化体は、パネル
，ブロックなどとして建築材料に広く使用されている。
かくして本発明によれば、ＡＬＣ粉の添加量を増やして
も、均一な気泡を有する硬化体を得ることが出来る。以
下に実施例を挙げて、本発明を更に具体的に説明する。
なお、実施例、比較例中の部，及び％は、特に断りのな
い限り重量基準である。[0010] The thus obtained cured product is widely used as building materials such as panels and blocks. Thus, according to the present invention, even if the amount of ALC powder added is increased, a cured product having uniform bubbles can be obtained. The present invention will be explained in more detail with reference to Examples below. Note that parts and percentages in Examples and Comparative Examples are based on weight unless otherwise specified.
【００１１】[0011]
【００１２】0012
【実施例１および比較例１】総固形分を１００として、
生石灰粉を７部、セメントを３０部、珪石粉を６０部、
石膏を３部混合したものに、水及び発泡剤としてのアル
ミニューム粉を加えたスラリーをブランクとし、ブラン
クに対し珪石粉６０部中の１０，２０，３０，４０部を
ＡＬＣ粉に置き換え、且つポリアルキルアリルスルフォ
ン酸系界面活性剤として、マイティ−１５０（花王（株
）製）をＡＬＣ粉１に対し０．０３部添加したスラリー
を調整した。その組成表を表１に示す。[Example 1 and Comparative Example 1] Setting the total solid content as 100,
7 parts quicklime powder, 30 parts cement, 60 parts silica powder,
A slurry prepared by adding water and aluminum powder as a blowing agent to a mixture of 3 parts of gypsum was used as a blank, and 10, 20, 30, and 40 parts of 60 parts of silica powder were replaced with ALC powder, and A slurry was prepared by adding 0.03 parts of Mighty-150 (manufactured by Kao Corporation) as a polyalkylaryl sulfonic acid surfactant to 1 part of ALC powder. The composition table is shown in Table 1.
【００１３】又、そのスラリー粘性，硬化時間，気泡斑
，製品のＸ−Ｒａｙ回折強度，圧縮強度，吸水特性，乾
燥収縮率を測定した。その結果を表２に示す。ポリアル
キルアリルスルフォン酸系界面活性剤をＡＬＣ粉１に対
し０．０３部添加することにより、ＡＬＣ粉の添加にも
拘らず混練水を増加することなく、スラリー粘性を一定
に保つことが出来た。Further, the slurry viscosity, curing time, bubble unevenness, X-Ray diffraction intensity, compressive strength, water absorption property, and drying shrinkage rate of the product were measured. The results are shown in Table 2. By adding 0.03 parts of polyalkylaryl sulfonic acid surfactant to 1 part of ALC powder, slurry viscosity could be kept constant without increasing the amount of kneading water despite the addition of ALC powder. .
【００１４】又、混練水を一定にして、珪石粉の一部を
ＡＬＣ粉に置き換えた場合、ＡＬＣ粉の添加量が３０％
以下であれば、ブランクに対して製品性能は低下せず、
特に１０％までは製品性能が向上した。[0014] Furthermore, when the kneading water is kept constant and part of the silica powder is replaced with ALC powder, the amount of ALC powder added is 30%.
If the following is true, the product performance will not deteriorate compared to the blank.
In particular, the product performance improved up to 10%.
【００１５】[0015]
【比較例２〜４】比較例として、界面活性剤を含まない
スラリー（比較例２）、実施例１のサンプル２のポリア
ルキルアリルスルフォン酸系界面活性剤に代えて、リグ
ニンスルフォン酸系界面活性剤（比較例３）及びポリカ
ルボン酸系界面活性剤（比較例４）を添加したスラリー
を用いて、ＡＬＣを製造した。各々の配合比を表３に、
当該組成におけるスラリー粘度、硬化時間、気泡斑、Ｘ
線回折強度、圧縮強度、乾燥収縮率、吸水率の測定結果
を表４に示す。[Comparative Examples 2 to 4] As a comparative example, a slurry containing no surfactant (Comparative Example 2), a lignin sulfonic acid surfactant instead of the polyalkylaryl sulfonic acid surfactant of Sample 2 of Example 1, ALC was manufactured using a slurry to which a surfactant (Comparative Example 3) and a polycarboxylic acid surfactant (Comparative Example 4) were added. The mixing ratio of each is shown in Table 3.
Slurry viscosity, curing time, bubble unevenness, X in the composition
Table 4 shows the measurement results of linear diffraction intensity, compressive strength, drying shrinkage, and water absorption.
【００１６】界面活性剤を添加せずに、混練水量でスラ
リー粘度を調整する比較例２の場合は、ＡＬＣ粉添加量
に対しほぼ同等の混練水の増加を要する。そして、混練
水を増量した結果、硬化の遅延、圧縮強度の低下、吸水
率の増加等の弊害が認められた。また、リグニンスルフ
ォン酸系界面活性剤を添加した場合は、スラリー粘度は
実施例１とほぼ同程度のものが得られたが、硬化時間が
長くなり、一方、ポリカルボン酸系界面活性剤を添加し
た場合、充分な粘性低下効果が認められず、かつ硬化の
遅延も見られた。In the case of Comparative Example 2 in which the slurry viscosity is adjusted by the amount of kneading water without adding a surfactant, it is necessary to increase the amount of kneading water by approximately the same amount as the amount of ALC powder added. As a result of increasing the amount of kneading water, adverse effects such as delayed curing, decreased compressive strength, and increased water absorption were observed. In addition, when a lignin sulfonic acid surfactant was added, the slurry viscosity was almost the same as in Example 1, but the curing time was longer. In this case, a sufficient viscosity lowering effect was not observed and curing was delayed.
【００１７】なお、実施例・比較例中の物性値は、以下
の方法によって求めた。
スラリー粘性：山崎式回転粘度計（型式ＹＵ６−Ｓ）に
よる、４００ｒｐｍに於ける価
硬化時間：土壌式硬度計による硬度が２５度に達する時
間
気泡系数：６００ｍｍ×６００ｍｍのパネル表面に現れ
た、相当直径が１．５ｍｍ以上の気泡の面積の合計値Ｘ
線回折強度：リガク社製Ｘ線回折測定装置による、２θ
＝７．８，１６．２，２９．０，３０．０，３１．７に
於けるピーク高さの合計値
圧縮強度：１００ｍｍ×６００ｍｍ×６００ｍｍの試験
体を含水率＝５〜１０％に調整し、圧縮試験機により、
毎秒０．１〜０．２Ｎ／ｍｍ２ で載荷したときの強度
乾燥収縮率：ＪＩＳ Ａ １１２９に規定する、ダ
イヤルゲージ法
吸水率：１００ｍｍ×１００ｍｍ×３００ｍｍの試験体
を含水率＝５．５ｖｏｌ％を起点とし１００ｍｍ×１０
０ｍｍの一面を水面下１０ｍｍになるようにして、１週
間後の吸水量を試験体の体積で除した値[0017] The physical property values in Examples and Comparative Examples were determined by the following method. Slurry viscosity: Value measured by Yamazaki rotary viscometer (model YU6-S) at 400 rpm.Curing time: Time required for hardness to reach 25 degrees measured by soil type hardness meter.Number of bubbles: Equivalent to the amount that appears on the surface of a 600mm x 600mm panel. Total area of bubbles with a diameter of 1.5 mm or more
Linear diffraction intensity: 2θ by Rigaku X-ray diffraction measuring device
= Total value of peak heights at 7.8, 16.2, 29.0, 30.0, 31.7 Compressive strength: 100 mm x 600 mm x 600 mm test specimen adjusted to moisture content = 5 to 10% Then, using a compression tester,
Strength when loaded at 0.1 to 0.2 N/mm2 per second Drying shrinkage rate: Specified in JIS A 1129, dial gauge method Water absorption rate: A test specimen of 100 mm x 100 mm x 300 mm was tested with water content = 5.5 vol%. Starting point: 100mm x 10
The value obtained by dividing the amount of water absorbed after one week by the volume of the test specimen, with one side of 0mm 10mm below the water surface.
【００１８】[0018]
【表１】[Table 1]
【００１９】[0019]
【表２】[Table 2]
【００２０】[0020]
【表３】[Table 3]
【００２１】[0021]
【表４】[Table 4]
【００２２】[0022]
【発明の効果】本発明によれば、ＡＬＣ粉を原料に回収
使用しても、混水量を増やすことなく、スラリーの粘度
を一定に保つことが出来る。そのため、混水量を一定に
したまま、製品性能を維持しつつ、ＡＬＣ粉を総固形分
の３０ｗｔ％まで添加することが可能となり、ＡＬＣ粉
がより有効に回収使用できる。According to the present invention, even if ALC powder is recovered and used as a raw material, the viscosity of the slurry can be kept constant without increasing the amount of mixed water. Therefore, it is possible to add ALC powder up to 30 wt% of the total solid content while keeping the amount of mixed water constant and product performance, and the ALC powder can be recovered and used more effectively.
Claims (1)
する水スラリー状原料に発泡剤を混合して、型枠内に供
給して半硬化後に適当な大きさに切断し、高温高圧養生
を行い、軽量気泡コンクリートを製造する方法に於いて
、前記原料に、軽量気泡コンクリート粉を総固形分の３
０ｗｔ％以下添加し、且つ、ポリアルキルアリルスルフ
ォン酸系界面活性剤を、総固形分に対し０．０１〜１．
０ｗｔ％添加することを特徴とする軽量気泡コンクリー
ト製造方法。Claim 1: A foaming agent is mixed with a water slurry-like raw material mainly composed of calcareous raw materials and silicic raw materials, and the mixture is fed into a mold, semi-hardened, cut into appropriate sizes, and cured at high temperature and high pressure. In the method of manufacturing lightweight aerated concrete, the raw materials include lightweight aerated concrete powder with a total solid content of 3.
0 wt % or less, and the polyalkylaryl sulfonic acid surfactant is added in an amount of 0.01 to 1.0 wt% based on the total solid content.
A method for producing lightweight aerated concrete characterized by adding 0 wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3071684A JPH04310556A (en) | 1991-04-04 | 1991-04-04 | Production of lightweight aerated concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3071684A JPH04310556A (en) | 1991-04-04 | 1991-04-04 | Production of lightweight aerated concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04310556A true JPH04310556A (en) | 1992-11-02 |
Family
ID=13467633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3071684A Withdrawn JPH04310556A (en) | 1991-04-04 | 1991-04-04 | Production of lightweight aerated concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04310556A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003055027A (en) * | 2001-08-08 | 2003-02-26 | Sumitomo Kinzoku Kozan Siporex Kk | Calcium silicate based raw material utilizing alc scrap wood, production method therefor and method for producing alc using the same raw material |
| JP2008291645A (en) * | 2000-01-18 | 2008-12-04 | Asahi Kasei Construction Materials Co Ltd | Humidity conditioning building material |
| CN102515613A (en) * | 2011-12-05 | 2012-06-27 | 马鞍山中海新材料有限公司 | Method for preparing naphthalene based superplasticizer by using refined naphthalene by-product 90 naphthalene |
| CN112645656A (en) * | 2020-12-28 | 2021-04-13 | 深圳市华威环保建材有限公司 | Decoration waste base high-strength foam concrete and preparation method thereof |
| CN113754371A (en) * | 2021-08-30 | 2021-12-07 | 广东盛瑞科技股份有限公司 | Foamed light soil with high stone powder content and preparation method thereof |
-
1991
- 1991-04-04 JP JP3071684A patent/JPH04310556A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008291645A (en) * | 2000-01-18 | 2008-12-04 | Asahi Kasei Construction Materials Co Ltd | Humidity conditioning building material |
| JP2003055027A (en) * | 2001-08-08 | 2003-02-26 | Sumitomo Kinzoku Kozan Siporex Kk | Calcium silicate based raw material utilizing alc scrap wood, production method therefor and method for producing alc using the same raw material |
| CN102515613A (en) * | 2011-12-05 | 2012-06-27 | 马鞍山中海新材料有限公司 | Method for preparing naphthalene based superplasticizer by using refined naphthalene by-product 90 naphthalene |
| CN112645656A (en) * | 2020-12-28 | 2021-04-13 | 深圳市华威环保建材有限公司 | Decoration waste base high-strength foam concrete and preparation method thereof |
| CN113754371A (en) * | 2021-08-30 | 2021-12-07 | 广东盛瑞科技股份有限公司 | Foamed light soil with high stone powder content and preparation method thereof |
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