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± +Ð%ӄ0Һ7Ĉӂ1&ѬӠ1*ĈӜ &+ӎ8NÉN VÀ CO NGÓT 1Ӝ,6,1+&Ӫ$%Ç7Ð1*
EFFECT OF RIVER SAND REPLACEMENT WITH BOTTOM ASH UNDER SATURATED-SURFACE DRY CONDITION ON COMPRESSIVE STRENGTH AND AUTOGENOUS SHRINKAGE
OF CONCRETE
Chuyên ngành: ӻ7KXұW;k\DӵQJ Mã ngành: 60580208
/8Ұ19Ă17+Ҥ&6Ƭ
Trang 2CÐ1*75Î1+ĈѬӦC HOÀN THÀNH TҤI 75ѬӠ1*ĈҤI HӐC BÁCH KHOA ± Ĉ+4*-HCM
5 Ӫy viên 3*676/ѬѪ1*9Ă1+ҦI
Xác nhұn cӫa Chӫ tӏch HӝL ÿӗQJ ÿiQK JLi /9 Yj 7Uѭӣng Khoa quҧn lý chuyên
Trang 3LUҰ19Ă1THҤC SӺ HVTH: NGUYӈN TRӐNG HӲU
Trang 4LUҰ19Ă1THҤC SӺ HVTH: NGUYӈN TRӐNG HӲU
ĈҤI HӐC BÁCH KHOA TP.HCM
.+2$Ĉ¬27Ҥ26$8ĈҤI HӐC
CӜNG HÒA XÃ HӜI CHӪ 1*+Ƭ$9,ӊT NAM
Ĉӝc Lұp - Tӵ Do - Hҥnh Phúc 1+,ӊ09Ө/8Ұ19Ă17+Ҥ&6Ƭ
I 7Ç1Ĉӄ TÀI:
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UNDER SATURATED-SURFACE DRY CONDITION ON COMPRESSIVE STRENGTH AND AUTOGENOUS SHRINKAGE
OF CONCRETE´
II NHIӊM VӨ VÀ NӜI DUNG
1 7әQJTXDQtình hình QJKLrQFӭXWURQJYDҒQJRDҒLQѭѫғFYӅYLӋFVӱGөQJWUR[ӍWURQJYLӋFFKӃWҥRErW{QJÿһFELӋWOjWURÿi\QKLӋWÿLӋQ
2 ĈӅ[XҩWKӋQJX\rQYұWOLӋXÿӇFKӃWҥRErW{QJYjWKLӃWNӃFҩSSKӕLErW{QJFyYjNK{QJFyVӱGөQJWURÿi\QKLӋWÿLӋQӣWUҥQJWKiLKzDQѭӟF± NK{EӅPһW
3 ĈӅ[XҩWFiFSKѭѫQJSKiSWKӵFQJKLӋPÿӇNKҧRViWҧQKKѭӣQJFӫDWURÿi\QKLӋWÿLӋQӣWUҥQJWKiLEmRKzDQѭӟF± NK{EӅPһWWKD\WKӃFӕWOLӋXQKӓ FiWV{QJ ÿӃQFiFWtQKFKҩWFӫDErW{QJEDRJӗPFѭӡQJÿӝFKӏXQpQFѭӡQJÿӝFKӏXkéo khi XӕQ và WtQKFRQJyWQӝLVLQK
III NGÀY GIAO NHIӊM VӨ : 14 /01/2020 IV NGÀY HOÀN THÀNH NHIӊM VӨ : 21/12/2020
V HӐ VÀ TÊN CÁN BӜ +ѬӞNG DҮN: TS BÙI 3+ѬѪ1*75,1+
7S+&0QJj\WKiQJQăP2020
Trang 5LUҰ19Ă1THҤC SӺ HVTH: NGUYӈN TRӐNG HӲU
/Ӡ,&Ҧ0Ѫ1
LXұQYăQOj NӃWTXҧ QJKLrQFӭXWKӵFKLӋQ FXӕLNKyDKӑFWURQJFKѭѫQJWUuQKKӑFFDRKӑFFӫDKӑFviên 7KӵFKLӋQKRjQFKӍQKOXұQYăQ theo KѭӟQJÿӅFѭӡQJÿmÿӅ[XҩWWUѭӟFÿy giúp cho KӑF viên FyQKӳQJNLQKQJKLӋPÿӇÿӏQKKѭӟQJYjWӵOӵFJLҧLTX\ӃWYҩQÿӅÿmÿһWUD, FNJQJQKѭ SKѭѫQJKѭӟQJQJKLrQFӭXÿӇJLҧLTX\ӃWYjWKӵFKLӋQFiFQKLӋP Yө\rXFҫXÿһWUD
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Em xin Ej\WӓVӵELӃWѫQchân thành ÿrQ F{76%L3KѭѫQJ7ULQKÿmWұQWuQKKѭӟQJGүQ, JL~SÿӥHPKRjQWKjQKOXұQYăQYjF{FNJQJOjQJѭӡLÿӝQJYLrQFNJQJQKѭ JӧLêÿӏQKKѭӟQJQJKLrQFӭX, giúp em ÿDPPrWuPKLӇXcác NLӃQWKӭFFҫQWKLӃWÿӇSKөFYөNӻQăQJWӵQJKLrQFӭXcho QKӳQJÿӅWjLWLӃSWKHRsau này(P[LQFҧPѫQFiFEҥQcùng khóa ÿmFKLDVҿ WjLOLӋXYjJL~SÿӥHPWURQJTXiWUuQKhoàn thành OXұQYăQWURQJÿyFyEҥQ9}9ăQ&KtÿmÿӗQJKjQKSKӕLKӧSWKӵFKLӋQÿӅWjLYӟLNӃWTXҧWKӵFQJKLӋPQj\ /XұQYăQQj\ÿѭӧFKRjQWKjQKWKHRWKӡLJLDQTX\ÿӏQKEҵQJVӵQӛOӵFWKӵFKLӋQFӫDEҧQWKkQWX\QKLrQFNJQJNKyWUiQKNKӓLQKӳQJVDLVyWNtQKPRQJQKұQÿѭӧFVӵJySêWӯTXê7Kҫ\&{ÿӇem KRjQWKLӋQOXұQYăQÿѭӧFWӕWQKҩWFyWKӇ
Xin tUkQWUӑQJFҧPѫQ
%ӃQ7UH, ngày tháng QăP2020 HVTH
Trang 6LUҰ19Ă1THҤC SӺ HVTH: NGUYӈN TRӐNG HӲU 1JX\ӉQ7UӑQJ+ӳX
7Ï07Ҳ7
+LӋQ nay, cát [k\GӵQJWURQJWӵQKLrQÿDQJQJj\FjQJFҥQNLӋW; trong khi WURÿi\ (CBA) FӫDQKjPi\QKLӋWÿLӋQSKiWWKҧLQJj\FjQJQKLӅX'Rÿynghiên FӭXFKӃWҥRErW{QJVӱGөQJCBA WKD\WKӃFӕWOLӋXQKӓ(cát sông) là QKXFҫXFҫQ WKLӃW 7URQJQJKLrQFӭXQj\, WiFJLҧÿmÿӏQKhѭӟQJQJKLrQFӭX tӹ OӋFӫDCBA ӣWUҥQJWKiLEmRKzDQѭӟFNK{EӅPһW &%$ 66' WKD\WKӃFӕWOLӋXQKӓWӵQKLrQ(cát sông) OҫQOѭӧt là 0%, 25%, 50%, 75%, và 100% YӅWKӇWtFK ÿӇFKӃWҥRErtông có FѭӡQJ ÿӝ B40 (WӭF M500) KӃWTXҧWKӵFQJKLӋPFKRWKҩ\YLӋFVӱGөQJ&%$ 66' WKD\WKӃFӕWOLӋXQKӓFKRFѭӡQJÿӝFKӏXQpQ YjNKҧQăQJFKӏXNpRNKLXӕQ ÿӅX FҧLWKLӋQ KѫQVRYӟLPүXÿӕLFKӭQJ WӭFM0); WURQJÿy, WӕLѭXQKҩWOjPүXVӱGөQJ&%$ 66' PүX M50) ӣFKӃÿӝGѭӥQJKӝNtQEҵQJW~L3( TҩWFҧFiFPүXFyFKӭD &%$ 66' ÿӅXFyWәQJFRQJyWQӝLVLQKWKҩSKѫQVR YӟLPүXÿӕLFKӭQJ(M0) ÿӃQQJj\WXәL Khi sRViQKJLӳDKDLFKӃÿӝEҧRGѭӥQJ bên ngoài bao JӗP GѭӥQJKӝ WURQJQѭӟFYj(2) GѭӥQJKӝNtQEҵQJW~L3(WҥLWKӡLÿLӇPQJj\WXәL, FѭӡQJÿӝFKӏXnén FӫDErW{QJÿѭӧF dѭӥQJKӝNtQEҵQJW~L3( FDRKѫQ; tuy nhiên, NK{QJFyVӵFKrQKOӋFKTXiOӟQ YӅFѭӡQJÿӝ FKӏX NpRNKLXӕQJLӳDKDLFKӃÿӝEҧRGѭӥQJӣQJj\WXәL TҩWFҧFiFPүXFyFKӭD&%$ (SSD) ÿӅXcó NKӕLOѭӧQJ WKӇWtFKWKҩSKѫQVRYӟLPүXÿӕLFKӭQJ(M0) ĈӗQJWKӡL, KҫXKӃWFiFPүXFyFKӭD&%$ 66' ÿӅXFyÿӝK~WQѭӟFYjWKӇWtFKOӛUӛQJKӣFDRKѫQVRYӟLPүXÿӕLFKӭQJ (M0), QJRҥLWUӯPүX0có ÿӝK~WQѭӟFYjWKӇWtFKOӛUӛQJKӣWѭѫQJÿѭѫQJYӟLPүXÿӕLFKӭQJ(M0) .KҧQăQJ clo WKkPQKұSYjR PүXFyFKӭDKjPOѭӧQJ&%$
Trang 7LUҰ19Ă1THҤC SӺ HVTH: NGUYӈN TRӐNG HӲU ABSTRACT
Recently, natural river sand used for construction is increasingly exhausted while coal bottom ash (CBA) from coal-fired power plants is increasing Therefore, studies on making concrete using CBA as river sand replacement are urgent needs In this research, the author investigated the ratio replacements of CBA under the saturated surface dry condition (CBA (SSD)) of 0%, 25%, 50%, 75%, and 100% (by volume) to produce concrete with strength grade of B40 (i.e., M500) The experimental results showed that the use of CBA (SSD) as river sand replacement improved compressive strength and flexural strength of the concrete when compared with the control concrete (i.e., M0), and the optimum concrete was the sample with 50% CBA (SSD) replacement (sample M50) cured under sealed condition with PE bags All samples containing CBA (SSD) had a lower autogenous shrinkage than the control sample (M0) up to 57 days of aging When comparing two types of curing condition, including (1) water curing and (2) sealed curing with PE bags, the compressive strength at the age of 28 days of the concrete cured with PE bags was higher However, there was no significant difference in flexural strength of the concrete cured under two curing conditions All samples containing CBA (SSD) had a lower bulk density than the control sample (M0) In addition, most of the samples containing CBA (SSD) had higher water absorption and void volume than the M0 sample, except the M50 sample having the nearly same water absorption and void volume Chloride penetration of samples with 50% CBA (SSD) replacement was lower than that of the control sample (M0), namely: chloride penetration depth of the M50 sample was (1 ÷ 1.5) cm while that of the M0 sample was (2.5 ÷ 3) cm
Trang 8LUҰ19Ă1THҤC SӺ HVTH: NGUYӈN TRӐNG HӲU /Ӡ,&$0Ĉ2$1
7{L[LQFDPÿRDQÿk\OjF{QJYLӋc do chính tôi thӵc hiӋQGѭӟi sӵ Kѭӟng dүn cӫDF{76%L3KѭѫQJ7ULQK
1ӝLGXQJ WURQJOXұQYăQOjKRjQWRjQÿ~QJYӟLVӵWKұWYjFKѭDÿѭӧFtrình bày ӣFiFQJKLrQFӭXOXұQYăQ NKiFQJRҥLWUӯFiFNӃWTXҧÿѭӧFWKDPNKҧROLrQTXDQÿӃQOXұQYăQ
7{L[LQFKӏXKRjQWRjQWUiFKQKLӋPYӅFiFF{QJYLӋFÿmWKӵFKLӋQFӫDPuQK 7S+ӗ&Kt0LQK, ngày 28 tháng 12 QăP
NguyӉn Trӑng Hӳu
Trang 9LUҰ19Ă1THҤC SӺ HVTH: NGUYӈN TRӐNG HӲU 0Ө&/Ө&
1.2.2 Tình hình nghiên cӭu trên thӃ giӟi 4
1.3 MӨC TIÊU CӪ$Ĉӄ TÀI NGHIÊN CӬU 13
2.2 LÝ THUYӂT QUÁ TRÌNH MҨ71ѬӞC CӪA BÊ TÔNG [16] 18
2.3 'ѬӤNG HӜ Ҭ0&+2%Ç7Ð1*7521*Ĉ,ӄU KIӊN KHÍ HҰU NÓNG ҬM Ӣ VIӊT NAM [16] 18
2.3.1 Khái niӋm 18
2.3.2 *LDLÿRҥn bҧRGѭӥQJEDQÿҫX %'%Ĉ