TW201943673A - Hydraulic cement-free fly ash binder material capable of reducing carbon dioxide emissions and being suitable for precast products - Google Patents

Hydraulic cement-free fly ash binder material capable of reducing carbon dioxide emissions and being suitable for precast products Download PDF

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Publication number
TW201943673A
TW201943673A TW107113150A TW107113150A TW201943673A TW 201943673 A TW201943673 A TW 201943673A TW 107113150 A TW107113150 A TW 107113150A TW 107113150 A TW107113150 A TW 107113150A TW 201943673 A TW201943673 A TW 201943673A
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Taiwan
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fly ash
binder material
cao
cement
hydraulic cement
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TW107113150A
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Chinese (zh)
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范承志
趙紹錚
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范承志
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Priority to TW107113150A priority Critical patent/TW201943673A/en
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    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

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  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Disclosed is a hydraulic cement-free fly ash binder material, wherein the binder material is formed by stirring and mixing fly ash and quicklime, wherein the chemical composition of the fly ash mainly consists of CaO and SiO2, and meets the standard of CNS3036; the main chemical composition of quicklime is CaO, and the content must be 90% or higher. Once the hydraulic cement-free fly ash binder material is mixed with water and a hydration reaction is generated, an excellent cementation and hardening effect is thus produced. The binder material of the present invention is used to completely replace traditional cement, and when it is used as the binder material for concrete or mortar, not only the amount of cement to be used is reduced, and carbon dioxide emissions are also decreased, thereby achieving the purpose of optimizing resource recovery of industrial waste. Furthermore, the disclosed has a property of short curing time, therefore, it is very suitable for precast products as it increases the use frequency of molds for precast products.

Description

水硬性無水泥飛灰膠結材料Hydraulic cementless fly ash cementitious material

本發明是一種使用於混凝土或砂漿的膠結材料，特別是一種完全無使用水泥的膠結材料，當其用來完全替代水泥時，可達節能減碳的效果，同時具有固化時間短暫的特性，非常適合用於預鑄製品，可增加預鑄製品模具的使用頻率。The invention is a cementing material used for concrete or mortar, especially a cementing material without cement. When it is used to completely replace cement, it can achieve the effect of energy saving and carbon reduction, and has the characteristics of short curing time. Suitable for concrete products, it can increase the use frequency of concrete products mold.

一般而言，水泥與水混拌後會產生水化反應，其膠結硬固並提供水泥強度的主要化學產物為C-S-H膠體，該膠體的化學反應方程式為3(CaO．SiO2 )+6H2 O=3CaO．2SiO2 ．3H2 O(即C-S-H膠體)+3Ca(OH)2 及2(2CaO．SiO2 )+4H2 O=3CaO．2SiO2 ．3H2 O(即C-S-H膠體)+Ca(OH)2 。Generally speaking, cement and water will produce a hydration reaction after mixing. The main chemical product that cements and provides cement strength is CSH colloid. The chemical reaction equation of the colloid is 3 (CaO.SiO 2 ) + 6H 2 O = 3CaO. 2SiO 2 . 3H 2 O (ie CSH colloid) + 3Ca (OH) 2 and 2 (2CaO.SiO 2 ) + 4H 2 O = 3CaO. 2SiO 2 . 3H 2 O (ie CSH colloid) + Ca (OH) 2 .

飛灰與水混拌後不會產生像水泥一樣的水化膠結反應，故無法產生膠結硬固的效果，因此飛灰通常被用來作為水泥的輔助膠結材料，主要係將飛灰先與水泥進行混拌後再與水混拌，透過水泥與水進行水化膠結反應後多餘的Ca(OH)2 ，再與飛灰中的SiO2 進行卜作嵐反應，其化學反應方程式為3Ca(OH)2 +2SiO2 →3CaO．2SiO2 ．3H2 O(C-S-H膠體)，即可使飛灰產生膠結硬固的效果。Fly ash does not produce hydration and cementation reaction like cement after mixing with water, so it cannot produce the effect of cementation and hardening. Therefore, fly ash is usually used as an auxiliary cementing material for cement. After mixing, it is mixed with water. The excess Ca (OH) 2 after cementation and water hydration and cementation reaction is carried out, and then the reaction with SiO 2 in fly ash is performed. The chemical reaction equation is 3Ca (OH) 2 + 2SiO 2 → 3CaO. 2SiO 2 . 3H 2 O (CSH colloid), can make the fly ash have the effect of cementation and solidification.

因此，本發明利用生石灰具有CaO含量高的特性，將生石灰與飛灰混拌後再與水混拌，使生石灰(CaO)與水(H2 O)產生水化反應，其化學反應方程式為CaO+H2 O=Ca(OH)2 ，然後再直接利用此Ca(OH)2 與飛灰中的SiO2 進行卜作嵐反應，其化學反應方程式為3Ca(OH)2 +2SiO2 →3CaO．2SiO2 ．3H2 O(C-S-H膠體)，使其產生膠結硬固的效果。Therefore, the present invention uses quick lime to have a high CaO content. The quick lime is mixed with fly ash and then mixed with water to cause a hydration reaction between quick lime (CaO) and water (H 2 O). The chemical reaction equation is CaO + H 2 O = Ca (OH) 2 , and then directly use this Ca (OH) 2 to carry out the Bu Zuolan reaction with SiO 2 in fly ash. The chemical reaction equation is 3Ca (OH) 2 + 2SiO 2 → 3CaO. 2SiO 2 . 3H 2 O (CSH colloid), which has the effect of cementing and hardening.

圖1係本發明與水產生水化膠結反應的組合，包括水11及水硬性無水泥飛灰膠結材料12。圖2係本發明水硬性無水泥飛灰膠結材料12，該膠結材料係由飛灰121與生石灰122混拌而成。經混拌後的水硬性無水泥飛灰膠結材料12，當其化學成分CaO/SiO2 的莫爾比為0.5至2時，在圖1中與水11混拌產生水化反應後，即具有良好的膠結硬固效果。FIG. 1 is a combination of the present invention and water to generate a hydration cementation reaction, including water 11 and a hydraulic cementless fly ash cementation material 12. FIG. 2 is a hydraulic cementless fly ash cementitious material 12 according to the present invention, which is made by mixing fly ash 121 and quicklime 122. After mixing the hydraulic cementless fly ash cementitious material 12, when the molar ratio of the chemical composition CaO / SiO 2 is 0.5 to 2, after mixing with water 11 in FIG. 1 to produce a hydration reaction, it has Good cementing effect.

(1)‧‧‧水化膠結反應組合(1) ‧‧‧hydration cementation reaction combination

(11)‧‧‧水(11) ‧‧‧Water

(12)‧‧‧水硬性無水泥飛灰膠結材料(12) ‧‧‧Hydraulic cementless fly ash cementitious material

(121)‧‧‧飛灰(121) ‧‧‧Fly Ash

(122)‧‧‧生石灰(122) ‧‧‧Lime

[圖1]係本發明與水產生水化反應的組合示意圖。 [圖2]係本發明水硬性無水泥飛灰膠結材料的混拌成分示意圖。[Fig. 1] It is a schematic combination diagram of the present invention and water to produce a hydration reaction. [Fig. 2] It is a schematic diagram of the mixing ingredients of the hydraulic cementless fly ash cementitious material of the present invention.

Claims (4)

一種水硬性無水泥飛灰膠結材料，該膠結材料係由飛灰與生石灰混拌而成，且該膠結材料的主要化學成分包含CaO及SiO2 。A hydraulic cementless fly ash cementitious material. The cementitious material is a mixture of fly ash and quicklime. The main chemical components of the cementitious material include CaO and SiO 2 . 依據申請專利範圍第1項所述之水硬性無水泥飛灰膠結材料，其中，飛灰的主要化學成分包含CaO及SiO2 ，且須符合CNS3036之標準。According to the hydraulic cementless fly ash cementitious material described in item 1 of the scope of patent application, the main chemical components of fly ash include CaO and SiO 2 , and must meet the standards of CNS3036. 依據申請專利範圍第1項所述之水硬性無水泥飛灰膠結材料，其中，生石灰的主要化學成分為CaO，且含量須高於90%以上。According to the hydraulic cementless fly ash cementitious material described in item 1 of the scope of patent application, the main chemical component of quicklime is CaO, and the content must be higher than 90%. 依據申請專利範圍第1項所述之水硬性無水泥飛灰膠結材料，當其主要化學成分CaO/SiO2 的莫爾比為0.5至2時，與水混拌產生水化反應後，即具有良好的膠結硬固效果。According to the hydraulic cementless fly ash cementitious material described in item 1 of the scope of the patent application, when the molar ratio of its main chemical component CaO / SiO 2 is 0.5 to 2, it will have a hydration reaction when mixed with water. Good cementing effect.
TW107113150A 2018-04-18 2018-04-18 Hydraulic cement-free fly ash binder material capable of reducing carbon dioxide emissions and being suitable for precast products TW201943673A (en)

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TW107113150A TW201943673A (en) 2018-04-18 2018-04-18 Hydraulic cement-free fly ash binder material capable of reducing carbon dioxide emissions and being suitable for precast products

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