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QURILISH MATERIALLARINING TURLARI VA ULARNING TASNIFI
Siddiqova Madinabonu
SamdAQU magistranti.
https://doi.org/10.5281/zenodo.12681289
Kirish
Turli xil qurilish materiallarning xom ashyo turi va ishlab chiqarish usulini hisobga
olgan holda, inshootlarda yoki texnologik asosda materiallarning ishlash sharoitlariga qarab, ularni
maqsadlariga muvofiq tasniflanadi.
Maqsadlariga ko'ra, materiallarni shartli ravishda ikki guruhga bo'lish mumkin: qurilish va
maxsus materiallar.
Asosan inshootlar uchun ishlatiladigan qurilish materiallari quyidagicha ajralib turadi:
1. Tabiiy tosh materiallari.
2. Anorganik biriktiruvchi moddalar.
3. Sun'iy tosh, olingan:
a) biriktirgichlar bilan bir hil holga keltirish (beton, temirbeton, eritmalar);
b) sinterlash (keramika materiallari);
c) eritish (stakan).
3. Metalllar (po'lat, quyma temir, alyuminiy, qotishmalar).
4. Polimerlar va plastmassalar.
5. Yog'och.
6. Kompozit (asbest tsement, shisha tolali, ...).
Tuzilmalarni atrof-muhitning zararli ta'siridan himoya qilish yoki ish faoliyatini yaxshilash
va qulaylik yaratish uchun zarur bo'lgan maxsus qurilish materiallari quyidagilar:
1. Issiqlik izolyatsiyasi.
2. Akustik.
3. Gidroizolyatsiya, tom yopish, muhrlash.
4. Tugatish.
5. Korroziyaga qarshi.
6. Olovga chidamli.
7. Radiatsiyadan himoya qilish uchun materiallar va boshqalar.
Har bir material uning ko'lamini va boshqa materiallar bilan birikish imkoniyatini
aniqlaydigan turli xil xususiyatlarga ega.
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Ma'lumki, qurilish materiallarining xususiyatlari ularni qo'llash sohasini belgilaydi. Faqat
materiallarning xususiyatlarini to'g'ri va sifatli baholash bilan binolar va inshootlarning
mustahkam va mustahkam qurilish inshootlarini olish mumkin.
Xususiyat - materialning alohida yoki aksariyat hollarda boshqa tashqi yoki ichki omillar
bilan birgalikda harakat qilishiga ma'lum tarzda ta'sir o'tkazish qobiliyati.
Bu yoki boshqa omillarning ta'siri materialning tarkibi va tuzilishiga, shuningdek binolar
va inshootlarni qurishda materialning ishlash sharoitlariga bog'liq.
Yong'in vaqtida qurilish materiallarida ta'sir etuvchi omillar
Operatsion omillar:
Bino yoki inshoot o'z maqsadini bajara olishi va bardoshli bo'lishi uchun ular yasagan har
bir inshootning ishlash sharoitlarini aniq tasavvur qilish kerak.
Ushbu shartlarni bilib, ma'lum bir konstruktsiyani ishlab chiqarish uchun mo'ljallangan
material qanday xususiyatlarga ega bo'lishi mumkinligini aniqlash mumkin.
Masalan, qo'llab-quvvatlovchi tuzilmalar ishlab chiqariladigan materiallarga qo'yiladigan
asosiy talab, ularning yuklarning ta'sirida shakl o'zgarishi va yo'q qilinishiga qarshi turish
qobiliyati, shuningdek, ba'zi hollarda past issiqlik o'tkazuvchanligi va ovoz o'tkazuvchanligi
(masalan, yopiq inshootlar).
Operatsion omillarga quyidagilar kiradi:
1. Materiallarning qo’lanilish sohasi
2. Tashqi yuk.
3. Ishlash shartlari.
Yong'in omillari:
1. Yong'inning harorat sharoitlari va davomiyligi.
2. O'chirish vositalari.
Tashqi omillar
Yong'in
omillari
Ichki omillar
xususiyatlari
tarkibi
Operatsion
omillar
Tuzilish
i
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3. Yong'in paytida agressiv muhit (yonish mahsulotlarining toksikligi, materiallarni yo'q
qilish).
Qurilish materiallarining asosiy xususiyatlarini tasnifi
Qurilish materiallarining asosiy xususiyatlarini quyidagi guruhlarga bo'lish mumkin:
Birinchi guruh
- fizik xususiyatlari: massaviy zichlik, zichlik, g'ovaklilik,
gigroskopiklik, suv yutish.
Ikkinchi guruh
mexanik xususiyatlar: kuch, qattiqlik, plastika, elastiklik
Uchinchi guruh
– tashqi munosabatlarni tavsiflovchi xususiyatlar materiallar issiqlik
ta'siriga: issiqlik o'tkazuvchanligi, issiqlik quvvati, yong'inga qarshilik, sovuqqa chidamlilik.
To'rtinchi guruh
- yong'in sharoitida xulq-atvorni tavsiflovchi xususiyatli materiallar:
yuqori harorat, yonuvchanlik, yonuvchanlik va boshqalar.
Jismoniy xususiyatlar.
Jismoniy xususiyatlarga materialning og'irlik xususiyatlari, zichligi, suyuqliklar, gazlar,
issiqlik, radioaktiv nurlanish o'tkazuvchanligi, shuningdek materialning tashqi ish muhitining
tajovuzkor ta'siriga qarshi turish qobiliyati kiradi.
Haqiqiy zichlik deb mutlaqo zich materialning birlik hajmining massasi tushuniladi va bu
quydagi formula bilan aniqlanadi.
bu erda, m - materialning massasi, kg; V - zich holatdagi material hajmi, m3.
O'rtacha zichlik deganda materialning tabiiy holatidagi birlik hajmining massasi
tushuniladi (bo'shliqlar va g'ovaklar bilan):
Bir xil turdagi materiallarning o'rtacha zichligi g'ovakliligi va bo'shligiga qarab har xil
bo'lishi mumkin.
Ommaviy materiallar (qum, maydalangan tosh, tsement va boshqalar) ommaviy zichlik
bilan ifodalanadi - donador va kukunli materiallar massasining ular egallagan butun hajmga
nisbati, shu jumladan zarralar orasidagi bo'shliq.
Materialning zichligi uning texnik xususiyatlarini aniqlaydi, masalan, quvvat, issiqlik
o'tkazuvchanligi. Zichlik materialning g'ovakliligi va namligiga bog'liq.
Borayotgan namlik bilan materialning zichligi oshadi.
Ba'zi qurilish materiallarining zichligi.
Материал
O'rtacha zichlik
0
, кг/м
3
Haqiqiy zichlik
,
кг/м
3
G'ovaklik P, %
,
/
V
m
=
.
/
0
V
m
=
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Kengaytirilgan polistirol
15-20
1050
86…81
Yog'och:
-
1550
-
Qarag'ay
400-600
-
74-61
Eman
700-900
-
55-42
Beton:
3000 oshmasligi
kerak
Asal qoliplari
500-1200
84-60
yengil
500-1800
84-40
Og'ir
1800-2500
40-17
Asbest sement
1400-2200
2750
25-40
Qizil g'isht
1600-1900
2500
36-24
Deraza oynasi
2500
до 2500
0
Metall:
Chelik St3
7800
7800
0
Alyuminiy qotishmalari
2850 oshmasligi kerak
2850 oshmasligi
kerak
0
Materialning g'ovakliligi (%) uning hajmini teshiklar bilan to'ldirish darajasidir:
Teshiklar - bu havo yoki suv bilan to'ldirilgan materialning kichik hujayralari.
Teshiklar ochiq va yopiq, kichik va katta. G'ovaklik qiymatini taxminiy baholash mumkin,
materialning boshqa muhim xususiyatlari: zichligi, mustahkamligi, suvga singishi, chidamliligi va
boshqalar.
Bo'shliq - bo'shashgan material (qum, maydalangan tosh va boshqalar) donalari orasida
hosil bo'lgan yoki ba'zi mahsulotlarda mavjud bo'lgan bo'shliqlar miqdori.
Ba'zi materiallar namlanganda suvni shimib oladi va quritganda uni bo'shatib yuboradi.
Materialning suv bilan to'yinganligi, uning ustida suyuqlik suyuq holatda yoki bug
'shaklida bo'lganda paydo bo'lishi mumkin. Shu munosabat bilan ikkita moddiy xususiyat
ajratiladi: gigroskopiklik va suv yutish.
Gigroskopiklik - materialning suv bug'lari va havosini yutish va ushlab turish xususiyati.
Bu havo haroratiga, uning nisbiy namligiga, teshiklarning turi, soni va hajmiga, shuningdek
moddaning tabiatiga bog'liq.
.
100
)
/
1
(
0
−
=
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Suvni yutish - bu materialning suvni yutish va ushlab turish qobiliyatidir. U butunlay suvga
botgan quruq material tomonidan so'rilgan suv miqdori bilan tavsiflanadi va massaning foizida
ifodalanadi.
Suv bilan to'yingan materialning oxirgi bosim kuchining nisbati (R sat) Quruq holatdagi
(R quruq) materialning yakuniy bosim kuchiga nisbati yumshatilish koeffitsienti deb ataladi:
Ushbu koeffitsient materialning suvga chidamliligini tavsiflaydi. Oson namlangan
materiallar (loy) uchun k = 0, suv ta'sirida kuchini to'liq saqlaydigan materiallar (metall, shisha)
uchun k = 1. K> 0,8 bo'lgan materiallar suv o'tkazmaydigan deb tasniflanadi; muntazam ravishda
namlanadigan joylarda k <0,8 bo'lgan materiallarga yo'l qo'yilmaydi.
Namlikni yo'qotish - materialning namlikni chiqarish qobiliyati.
Havoga chidamliligi - materialning uzoq vaqt davomida muntazam deformatsiyaga va
namlanishga va mexanik quvvatni yo'qotmasdan quritilishiga bardosh berish qobiliyati.
Suv o'tkazuvchanligi - materialning bosim ostida suvdan o'tishi. Suv o'tkazuvchanligi 1
MPa bosim ostida sinovdan o'tgan material maydonining 1 m2 dan 1 soat davomida o'tgan suv
miqdori bilan tavsiflanadi. Zich materiallar (po'lat, shisha) suv o'tkazmaydigan.
Mexanik xususiyatlari.
Mexanik xususiyatlar materialning siqilish, cho'zish, zarba berish, unga begona jismni
bosish va kuch ishlatib materialga ta'sir qilishning boshqa turlariga qarshilik ko'rsatish qobiliyati
bilan tavsiflanadi.
Kuch - materialning yukdan kelib chiqadigan stresslar ta'sirida yo'q qilinishiga qarshi turish
xususiyati. Strukturada bo'lgan materiallar turli xil yuklarni - siqishni, taranglik, egilish, ta'sirni
boshdan kechirishi mumkin.
Qurilish materiallarining mustahkamligi ularning yakuniy quvvati bilan tavsiflanadi.
Eng yuqori quvvat (Pa) - bu material namunasini yo'q qilishga olib keladigan yukga mos keladigan
stress:
R=N/A
bu erda N - halokat kuchi, H; A - sinovdan oldin namunaning tasavvurlar maydoni, m2.
Qattiqlik - bu materialning boshqa qattiq jismning unga kirib borishiga qarshi turish
qobiliyati. Ushbu xususiyat qayta ishlashda, shuningdek uni pollar, yo'l qoplamalari uchun
ishlatishda muhim ahamiyatga ega.
Deformatsiya - yuk ostida materiallar hajmi va shakli o'zgarishi.
.
/
сух
нас
разм
R
R
=
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Elastiklik - bu yukni olib tashlaganidan keyin asl shakli va o'lchamlarini tiklash uchun
materialning xususiyati.
Plastisit - bu materialning yuk ostida shaklini yorilmasdan o'zgartirish va yukni olib
tashlaganidan keyin bu shaklni saqlab qolish xususiyati. Barcha materiallar egiluvchan va mo'rt
bo'linadi. Mo'rt materiallar to'satdan sezilarli deformatsiyasiz qulab tushadi. Mo'rt materiallar
faqat siqilishga yaxshi ta'sir qiladi va cho'zish, egilish va zarbaga yomon ta'sir qiladi.
Ba'zi qurilish materiallarining mustahkamligi
Материал
Eng yuqori quvvat, MPa
siqilishda Rc
kuchlanishdagi Rt
egilishda Rw
Torf to'lovlari
0,5
-
0,25-0,28
Oddiy beton
5-30
0,6-2
-
Yuqori quvvatli beton
40-80
2,5-7
-
Gil g'isht
7,5-30
-
1,5-3,5
Yog'och (o'rtacha
ma'lumotlar)
Bo’ylama tolalar bo'ylab
50
130
100
Ko’ndalang tolalar
6,5
6,5
75
Shisha plast
420
450-470
410-460
Granit
100-120
2-4,4
-
Po’lat
380-450
380-450
-
Materiallarning issiqlik ta'siriga nisbatini tavsiflovchi xususiyatlar.
Issiqlik o'tkazuvchanligi - materialning namuna (mahsulot) sirtidagi harorat farqidan
kelib chiqadigan issiqlik oqimini o'tkazishi.
Bir hil materialning issiqlik o'tkazuvchanlik koeffitsienti J ma'lum bir materialning
devoridan qalinligi 1 m, maydoni 1 m bo'lgan vaqt ichida 1 m2, harorat bilan o'tadigan J ning
issiqlik miqdoriga teng 1 K devorning qarama-qarshi yuzalaridagi farq.
ko'p omillarga bog'liq:
- kimyoviy tarkibi;
- tuzilish (g'ovaklilik);
=
К
м
Вт
К
м
с
м
Дж
2
,
)
(
−
=
2
1
T
T
A
Q
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- harorat;
- moddiy namlik
Harorat ko'tarilganda,
o'zgaradi (ko'p materiallar uchun).
t
=
0
t
0
- da 0
С; t –materialning harorati,
С
Ba'zi qurilish materiallarining issiqlik o'tkazuvchanligi
Materialning
nomi
Issiqlik
o'tkazuvchanligiВт / (м
С)
Materialning nomi
Issiqlik
o'tkazuvchanligiВт / (м
С)
Po’lat
58
Suv
0,59
Granit
2,9...3,3
Yengil beton
0,35...0,8
Og'ir beton
1,0...1,6
Issiqlik saqlovchi
beton
0,08...0,3
keramika
g'ishtlari
0,8...0,9
Ko’pshitilgan shisha
0,06...0,08
Issiqlik sig'imi - materialning qizdirilganda ma'lum miqdorda issiqlikni yutish qobiliyati.
C - o'ziga xos issiqlik (issiqlik quvvati koeffitsienti) - bu 1 K ga 1 kg materialni isitish
uchun zarur bo'lgan Jouldagi issiqlik miqdori.
Haroratning oshishi bilan (ko'p materiallar uchun):
С
t
= C
0
+
C
t
С
0
– при 0
С, t – температура материала,
С
Теплоемкость некоторых строительных материалов
Материал
С, кДж/кг
К
Havo
0,97
Yog'och
2,51
G'isht
0,8
К
кг
Дж
T
T
m
Q
С
−
=
,
)
(
2
1
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Suv
4,2
Og'ir beton
0,8
Po’lat
0,42
Granit
0,8
Materiallarning muhim termofizik xususiyati bu materialdagi harorat o'zgarishi tezligini
tavsiflovchi issiqlik tarqalishi.:
.
,
2
0
с
м
C
a
=
Chunki
, С - haroratga bog'liq, keyin
a
ham harorat ko'tarilishi bilan o'zgaradi
Og'ir beton uchun harorat oshishi bilan pasayadi.
B55 sinfidagi og'ir beton uchun t=450
С -
a
= 1,3
10
-3
м
2
/с.
Beton isitishni hisoblashni soddalashtirish uchun t = 450 S da hisoblab chiqilgan va
namlikning isitish tezligiga ta'sirini hisobga olgan holda doimiy ravishda kamaytirilgan issiqlik
diffuzivligi ishlatiladi (bu keyingi o'rganish paytida hisoblashda ishlatiladi intizom).
.
)
012
,
0
(
0
+
=
w
C
a
t
red
Sovuqqa chidamliligi - suv bilan to'yingan materialning vayronagarchilik belgilari va
kuchning sezilarli pasayishisiz takrorlanadigan o'zgaruvchan muzlash va eritishga qarshi turish
qobiliyati.
Refrakterlik - bu materialning deformatsiyasiz yoki erimay, uzoq vaqt davomida yuqori
harorat ta'siriga dosh berish xususiyati. Olovga chidamlilik darajasi bo'yicha materiallar
refrakter, refrakter va past eriydiganlarga bo'linadi.
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Raximova
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HARAKAT QILISHGA O ‘RGATISHNI TASHKIL ETISH //Modern Science and
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