-
TCVN T I U C H U N Q U C G I A
TCVN 8860-8 : 2011
Xut bn ln 1
B TNG NHA - PHNG PHP TH - PHN 8: XC NH H S CHT LU LN
Asphalt Concrete Test methods
Part 8: Determination of Compaction Coefficient
H NI - 2011
-
TCVN 8860-8 : 2011
2
-
TCVN 8860-8 : 2011
3
Mc lc
1 Phm vi p dng
.....................................................................................................................
5
2 Ti liu vin dn
......................................................................................................................
5
3 Thut ng v nh ngha
.........................................................................................................
5
4 Xc nh h s cht lu ln
..................................................................................................
5
-
TCVN 8860-8 : 2011
4
Li ni u
TCVN 8860-8 : 2011 c chuyn i t 22 TCN 62-84 theo quy nh ti khon
1
iu 69 ca Lut Tiu chun v Quy chun k thut v im a khon 1 khon 1
iu
7 Ngh nh s 127/2007/N-CP ngy 1/8/2008 ca Chnh ph quy nh chi tit
thi
hnh mt s iu ca Lut Tiu chun v Quy chun k thut.
TCVN 8860-8 : 2011 do Vin Khoa hc v Cng ngh Giao thng Vn ti bin
son,
B Giao thng Vn ti ngh, Tng cc Tiu chun o lng cht lng thm nh,
B Khoa hc v Cng ngh Cng b.
B tiu chun TCVN 8860 : 2011 B tng nha Phng php th gm mi hai
phn:
- TCVN 8860-1 : 2011, Phn 1: Xc nh n nh, do Marshall
- TCVN 8860-2 : 2011, Phn 2: Xc nh hm lng nha bng phng php
chit s dng my quay li tm
- TCVN 8860-3 : 2011, Phn 3: Xc nh thnh phn ht
- TCVN 8860-4 : 2011, Phn 4: Xc nh t trng ln nht, khi lng ring
ca b
tng nha trng thi ri
- TCVN 8860-5 : 2011, Phn 5: Xc nh t trng khi, khi lng th tch ca
b
tng nha m nn
- TCVN 8860-6 : 2011, Phn 6: Xc nh chy nha
- TCVN 8860-7 : 2011, Phn 7: Xc nh gc cnh ca ct
- TCVN 8860-8 : 2011, Phn 8: Xc nh h s cht lu ln
- TCVN 8860-9 : 2011, Phn 9: Xc nh rng d
- TCVN 8860-10 : 2011, Phn 10: Xc nh rng ct liu
- TCVN 8860-11 : 2011, Phn 11: Xc nh rng lp y nha
- TCVN 8860-12 : 2011, Phn 12: Xc nh n nh cn li ca b tng nha
-
5
T I U C H U N Q U C G I A TCVN 8860-8 : 2011
B tng nha - Phng php th -
Phn 8: Xc nh h s cht lu ln
Asphalt Concrete - Test methods -
Part 8: Determination of Compaction Coefficient
1 Phm vi p dng
cht lu ln ca b tng nha (BTN) l mt trong cc ch tiu phc v cho vic
kim tra cht lng lu ln
trong qu trnh thi cng v kim tra nghim thu mt ng BTN .
2 Ti liu vin dn
Cc ti liu vin dn sau rt cn thit cho vic p dng tiu chun ny. i vi
cc ti liu vin dn ghi nm
ban hnh th p dng bn c nu. i vi cc ti liu vin dn khng ghi nm ban
hnh th p dng phin
bn mi nht, bao gm c cc sa i (nu c).
TCVN 8860-1 : 2011, B tng nha - Phng php th - Phn 1: Xc nh n nh,
do Marshall.
TCVN 8860-5 : 2011, B tng nha - Phng php th - Phn 5: Xc nh t
trng khi, khi lng th tch
ca b tng nha m nn.
3 Thut ng v nh ngha
Trong tiu chun ny s dng thut ng v nh ngha sau:
H s cht lu ln (Compaction Coefficient)
Ch tiu phn nh mc lu ln BTN ti hin trng. H s cht lu ln l t l phn
trm ca khi lng
th tch BTN c m nn trn hin trng bi cc thit b thi cng so vi khi
lng th tch ca BTN
c m nn theo phng php Marshall ti phng th nghim.
4 Xc nh h s cht lu ln
4.1 cht lu ln ca b tng nha, k hiu l K, tnh bng phn trm, chnh xc
ti 0,1%, c xc nh
theo cng thc:
mb
HT
mbK
x100
-
TCVN 8860-8 : 2011
6
trong :
mbHT l khi lng th tch ca BTN m nn hin trng, tnh bng gam trn
centimt khi
(g/cm3);
mb l khi lng th tch ca BTN m nn theo phng php Marshall, tnh bng
gam trn
centimt khi (g/cm3).
4.2 Xc nh khi lng th tch ca BTN m nn hin trng (mbHT )
4.2.1 Ti v tr mt ng BTN lu ln cn xc nh cht lu ln (K), tin hnh
khoan mu BTN theo 3.3.4,
TCVN 8860-1 : 2011.
4.2.2 Xc nh khi lng th tch ca ca BTN m nn hin trng (mbHT ) theo
quy nh ti TCVN
8860-5: 2011
4.3 Xc nh khi lng th tch ca BTN m nn trong phng th nghim
(mb)
4.3.1 Khi lng th tch ca BTN m nn trong phng th nghim (mb) xc nh
bng gi tr khi lng
th tch mu c Marshall ti trm trn b tng nha tng ng vi ca thi cng c
cha l trnh kim tra theo
TCVN 8860-5 : 2011.
4.3.2 Trng hp khng c s liu theo 4.3.1, tin hnh cc bc sau:
- Ly mu BTN mt ng t cc l trnh tng ng;
- Lm ti mu BTN, c ch b 03 mu Marshall theo 3.3.3, TCVN8860-1:
2011;
- Xc nh khi lng th tch ca BTN trn cc mu c Marshall theo quy nh
ti quy nh ti TCVN 8860-
5: 2011.
